{"id":626,"date":"2026-01-22T06:18:21","date_gmt":"2026-01-22T06:18:21","guid":{"rendered":"https:\/\/yashinfosec.com\/?p=626"},"modified":"2026-01-22T06:21:17","modified_gmt":"2026-01-22T06:21:17","slug":"authentication-sessions-cookies-explained-for-web-pentesters","status":"publish","type":"post","link":"https:\/\/yashinfosec.com\/?p=626","title":{"rendered":"Authentication, Sessions &#038; Cookies Explained for Web Pentesters"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"626\" class=\"elementor elementor-626\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-46e76a9 elementor-section-boxed elementor-section-height-default elementor-section-height-default wpr-particle-no wpr-jarallax-no wpr-parallax-no wpr-sticky-section-no\" data-id=\"46e76a9\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-b7ee571\" data-id=\"b7ee571\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-2295b63 elementor-widget elementor-widget-heading\" data-id=\"2295b63\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_80 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/yashinfosec.com\/?p=626\/#Day_2_%E2%80%93_WAPT_Foundations\" >Day 2 \u2013 WAPT Foundations<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/yashinfosec.com\/?p=626\/#1_What_Is_Authentication_Beyond_Username_Password\" >1. What Is Authentication? (Beyond Username &amp; Password)<\/a><ul class='ez-toc-list-level-5' ><li class='ez-toc-heading-level-5'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/yashinfosec.com\/?p=626\/#Where_Developers_Go_Wrong\" >Where Developers Go Wrong<\/a><ul class='ez-toc-list-level-6' ><li class='ez-toc-heading-level-6'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/yashinfosec.com\/?p=626\/#Key_pentesting_insight\" >Key pentesting insight:<\/a><\/li><\/ul><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/yashinfosec.com\/?p=626\/#2_Cookies_Explained_The_Backbone_of_Web_Sessions\" >2. Cookies Explained (The Backbone of Web Sessions)<\/a><ul class='ez-toc-list-level-6' ><li class='ez-toc-heading-level-6'><ul class='ez-toc-list-level-6' ><li class='ez-toc-heading-level-6'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/yashinfosec.com\/?p=626\/#Types_of_Cookies\" >Types of Cookies<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-6'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/yashinfosec.com\/?p=626\/#Why_Cookies_Matter_in_WAPT\" >Why Cookies Matter in WAPT<\/a><\/li><\/ul><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/yashinfosec.com\/?p=626\/#3_Session_Management\" >3. Session Management<\/a><ul class='ez-toc-list-level-6' ><li class='ez-toc-heading-level-6'><ul class='ez-toc-list-level-6' ><li class='ez-toc-heading-level-6'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/yashinfosec.com\/?p=626\/#Common_Session_Weaknesses\" >Common Session Weaknesses<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-6'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/yashinfosec.com\/?p=626\/#Classic_Attacks\" >Classic Attacks<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-5'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/yashinfosec.com\/?p=626\/#4_Tokens_JWT_API_Tokens_Bearer_Auth\" >4. Tokens (JWT, API Tokens, Bearer Auth)<\/a><ul class='ez-toc-list-level-6' ><li class='ez-toc-heading-level-6'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/yashinfosec.com\/?p=626\/#Common_Token_Types\" >Common Token Types<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-6'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/yashinfosec.com\/?p=626\/#Why_Tokens_Are_Dangerous\" >Why Tokens Are Dangerous<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-5'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/yashinfosec.com\/?p=626\/#5_Authentication_Logic_Flaws\" >5. Authentication Logic Flaws<\/a><\/li><\/ul><\/li><\/ul><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h2 class=\"elementor-heading-title elementor-size-default\"><span class=\"ez-toc-section\" id=\"Day_2_%E2%80%93_WAPT_Foundations\"><\/span>Day 2 \u2013 WAPT Foundations<span class=\"ez-toc-section-end\"><\/span><\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-c658f01 elementor-section-boxed elementor-section-height-default elementor-section-height-default wpr-particle-no wpr-jarallax-no wpr-parallax-no wpr-sticky-section-no\" data-id=\"c658f01\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-f02540a\" data-id=\"f02540a\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-0e4cd7a elementor-widget elementor-widget-text-editor\" data-id=\"0e4cd7a\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p data-start=\"444\" data-end=\"559\">If Day 1 was about <strong data-start=\"463\" data-end=\"484\">how the web works<\/strong>,<br data-start=\"485\" data-end=\"488\" \/>Day 2 is about <strong data-start=\"503\" data-end=\"558\">how identity is established, maintained, and broken<\/strong>.<\/p><p data-start=\"561\" data-end=\"694\">Most critical web breaches don\u2019t start with RCE or SQLi.<br data-start=\"617\" data-end=\"620\" \/>They start with <strong data-start=\"636\" data-end=\"693\">weak authentication logic and poor session management<\/strong>.<\/p><p data-start=\"696\" data-end=\"950\">This blog builds the mental model every web pentester must have before testing <strong data-start=\"775\" data-end=\"805\">A01: Broken Access Control<\/strong>, <strong data-start=\"807\" data-end=\"838\">A02: Cryptographic Failures<\/strong>, and <strong data-start=\"844\" data-end=\"893\">A07: Identification &amp; Authentication Failures<\/strong> in the <strong data-start=\"901\" data-end=\"949\"><span class=\"hover:entity-accent entity-underline inline cursor-pointer align-baseline\"><span class=\"whitespace-normal\">OWASP<\/span><\/span> Top 10<\/strong>.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-e864e74 elementor-section-boxed elementor-section-height-default elementor-section-height-default wpr-particle-no wpr-jarallax-no wpr-parallax-no wpr-sticky-section-no\" data-id=\"e864e74\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-2aef706\" data-id=\"2aef706\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-e7a2369 elementor-widget elementor-widget-heading\" data-id=\"e7a2369\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\"><span class=\"ez-toc-section\" id=\"1_What_Is_Authentication_Beyond_Username_Password\"><\/span>1. What Is Authentication? (Beyond Username &amp; Password)<span class=\"ez-toc-section-end\"><\/span><\/h4>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-8e015ba elementor-section-boxed elementor-section-height-default elementor-section-height-default wpr-particle-no wpr-jarallax-no wpr-parallax-no wpr-sticky-section-no\" data-id=\"8e015ba\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-ad5d169\" data-id=\"ad5d169\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-7a838ee elementor-section-boxed elementor-section-height-default elementor-section-height-default wpr-particle-no wpr-jarallax-no wpr-parallax-no wpr-sticky-section-no\" data-id=\"7a838ee\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-d4f334e\" data-id=\"d4f334e\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-316248a elementor-widget__width-initial elementor-widget elementor-widget-image\" data-id=\"316248a\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img data-opt-id=1708168357  fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"818\" src=\"https:\/\/mlefs6wcwvfi.i.optimole.com\/w:1024\/h:818\/q:mauto\/ig:avif\/https:\/\/yashinfosec.com\/wp-content\/uploads\/2026\/01\/website-login-user-flow.png\" class=\"attachment-large size-large wp-image-627\" alt=\"\" srcset=\"https:\/\/mlefs6wcwvfi.i.optimole.com\/w:1351\/h:1080\/q:mauto\/ig:avif\/https:\/\/yashinfosec.com\/wp-content\/uploads\/2026\/01\/website-login-user-flow.png 1836w, https:\/\/mlefs6wcwvfi.i.optimole.com\/w:300\/h:240\/q:mauto\/ig:avif\/https:\/\/yashinfosec.com\/wp-content\/uploads\/2026\/01\/website-login-user-flow.png 300w, https:\/\/mlefs6wcwvfi.i.optimole.com\/w:1024\/h:818\/q:mauto\/ig:avif\/https:\/\/yashinfosec.com\/wp-content\/uploads\/2026\/01\/website-login-user-flow.png 1024w, https:\/\/mlefs6wcwvfi.i.optimole.com\/w:768\/h:614\/q:mauto\/ig:avif\/https:\/\/yashinfosec.com\/wp-content\/uploads\/2026\/01\/website-login-user-flow.png 768w, https:\/\/mlefs6wcwvfi.i.optimole.com\/w:1351\/h:1080\/q:mauto\/ig:avif\/https:\/\/yashinfosec.com\/wp-content\/uploads\/2026\/01\/website-login-user-flow.png 1536w, https:\/\/mlefs6wcwvfi.i.optimole.com\/w:900\/h:719\/q:mauto\/ig:avif\/https:\/\/yashinfosec.com\/wp-content\/uploads\/2026\/01\/website-login-user-flow.png 900w, https:\/\/mlefs6wcwvfi.i.optimole.com\/w:500\/h:400\/q:mauto\/ig:avif\/https:\/\/yashinfosec.com\/wp-content\/uploads\/2026\/01\/website-login-user-flow.png 500w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-d50beb9 elementor-section-boxed elementor-section-height-default elementor-section-height-default wpr-particle-no wpr-jarallax-no wpr-parallax-no wpr-sticky-section-no\" data-id=\"d50beb9\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-dd445a4\" data-id=\"dd445a4\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-f9fc631 elementor-widget elementor-widget-text-editor\" data-id=\"f9fc631\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p data-start=\"1061\" data-end=\"1165\">Authentication is the process of <strong data-start=\"1094\" data-end=\"1114\">proving identity<\/strong> to an application.<br data-start=\"1133\" data-end=\"1136\" \/>It answers one question only:<\/p><blockquote data-start=\"1167\" data-end=\"1183\"><p data-start=\"1169\" data-end=\"1183\">\u201cWho are you?\u201d<\/p><\/blockquote><p data-start=\"1185\" data-end=\"1251\">This is fundamentally different from authorization, which answers:<\/p><blockquote data-start=\"1252\" data-end=\"1283\"><p data-start=\"1254\" data-end=\"1283\">\u201cWhat are you allowed to do?\u201d<\/p><\/blockquote><p data-start=\"1285\" data-end=\"1340\">In web applications, authentication commonly relies on:<\/p><ul data-start=\"1341\" data-end=\"1419\"><li data-start=\"1341\" data-end=\"1362\"><p data-start=\"1343\" data-end=\"1362\">Username + password<\/p><\/li><li data-start=\"1363\" data-end=\"1376\"><p data-start=\"1365\" data-end=\"1376\">Email + OTP<\/p><\/li><li data-start=\"1377\" data-end=\"1387\"><p data-start=\"1379\" data-end=\"1387\">API keys<\/p><\/li><li data-start=\"1388\" data-end=\"1402\"><p data-start=\"1390\" data-end=\"1402\">OAuth tokens<\/p><\/li><li data-start=\"1403\" data-end=\"1419\"><p data-start=\"1405\" data-end=\"1419\">SSO assertions<\/p><\/li><\/ul><h5 data-start=\"1421\" data-end=\"1450\"><span class=\"ez-toc-section\" id=\"Where_Developers_Go_Wrong\"><\/span>Where Developers Go Wrong<span class=\"ez-toc-section-end\"><\/span><\/h5><p data-start=\"1451\" data-end=\"1539\">Authentication failures are rarely about <em data-start=\"1492\" data-end=\"1514\">weak passwords alone<\/em>.<br data-start=\"1515\" data-end=\"1518\" \/>They usually involve:<\/p><ul data-start=\"1540\" data-end=\"1613\"><li data-start=\"1540\" data-end=\"1559\"><p data-start=\"1542\" data-end=\"1559\">Predictable logic<\/p><\/li><li data-start=\"1560\" data-end=\"1581\"><p data-start=\"1562\" data-end=\"1581\">Poor state handling<\/p><\/li><li data-start=\"1582\" data-end=\"1613\"><p data-start=\"1584\" data-end=\"1613\">Inconsistent validation paths<\/p><\/li><\/ul><p data-start=\"1615\" data-end=\"1624\">Examples:<\/p><ul data-start=\"1625\" data-end=\"1774\"><li data-start=\"1625\" data-end=\"1692\"><p data-start=\"1627\" data-end=\"1692\">Login endpoint validates credentials, but password reset does not<\/p><\/li><li data-start=\"1693\" data-end=\"1725\"><p data-start=\"1695\" data-end=\"1725\">MFA enforced on UI, not on API<\/p><\/li><li data-start=\"1726\" data-end=\"1774\"><p data-start=\"1728\" data-end=\"1774\">Error messages revealing whether a user exists<\/p><\/li><\/ul><p data-start=\"1776\" data-end=\"1870\">From a pentester\u2019s perspective, authentication is not a single feature \u2014 it is a <strong data-start=\"1857\" data-end=\"1869\">workflow<\/strong>.<\/p><h6><span class=\"ez-toc-section\" id=\"Key_pentesting_insight\"><\/span><strong data-start=\"1875\" data-end=\"1902\">Key pentesting insight:<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h6><p data-start=\"1872\" data-end=\"1992\">You don\u2019t test \u201clogin\u201d.<br data-start=\"1928\" data-end=\"1931\" \/>You test <strong data-start=\"1940\" data-end=\"1991\">every path that leads to an authenticated state<\/strong>.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-406bb37 elementor-section-boxed elementor-section-height-default elementor-section-height-default wpr-particle-no wpr-jarallax-no wpr-parallax-no wpr-sticky-section-no\" data-id=\"406bb37\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-50ae61f\" data-id=\"50ae61f\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-5b78333 elementor-widget elementor-widget-heading\" data-id=\"5b78333\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\"><span class=\"ez-toc-section\" id=\"2_Cookies_Explained_The_Backbone_of_Web_Sessions\"><\/span>2. Cookies Explained (The Backbone of Web Sessions)<span class=\"ez-toc-section-end\"><\/span><\/h4>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-5360929 elementor-section-boxed elementor-section-height-default elementor-section-height-default wpr-particle-no wpr-jarallax-no wpr-parallax-no wpr-sticky-section-no\" data-id=\"5360929\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-724148a\" data-id=\"724148a\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-ec58b10 elementor-widget__width-initial elementor-widget elementor-widget-image\" data-id=\"ec58b10\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img data-opt-id=650868965  fetchpriority=\"high\" decoding=\"async\" width=\"786\" height=\"1024\" src=\"https:\/\/mlefs6wcwvfi.i.optimole.com\/w:786\/h:1024\/q:mauto\/ig:avif\/https:\/\/yashinfosec.com\/wp-content\/uploads\/2026\/01\/0153-cookies.png\" class=\"attachment-large size-large wp-image-628\" alt=\"\" srcset=\"https:\/\/mlefs6wcwvfi.i.optimole.com\/w:829\/h:1080\/q:mauto\/ig:avif\/https:\/\/yashinfosec.com\/wp-content\/uploads\/2026\/01\/0153-cookies.png 1376w, https:\/\/mlefs6wcwvfi.i.optimole.com\/w:230\/h:300\/q:mauto\/ig:avif\/https:\/\/yashinfosec.com\/wp-content\/uploads\/2026\/01\/0153-cookies.png 230w, https:\/\/mlefs6wcwvfi.i.optimole.com\/w:786\/h:1024\/q:mauto\/ig:avif\/https:\/\/yashinfosec.com\/wp-content\/uploads\/2026\/01\/0153-cookies.png 786w, https:\/\/mlefs6wcwvfi.i.optimole.com\/w:768\/h:1000\/q:mauto\/ig:avif\/https:\/\/yashinfosec.com\/wp-content\/uploads\/2026\/01\/0153-cookies.png 768w, https:\/\/mlefs6wcwvfi.i.optimole.com\/w:828\/h:1080\/q:mauto\/ig:avif\/https:\/\/yashinfosec.com\/wp-content\/uploads\/2026\/01\/0153-cookies.png 1179w, https:\/\/mlefs6wcwvfi.i.optimole.com\/w:829\/h:1080\/q:mauto\/ig:avif\/https:\/\/yashinfosec.com\/wp-content\/uploads\/2026\/01\/0153-cookies.png 900w, https:\/\/mlefs6wcwvfi.i.optimole.com\/w:500\/h:651\/q:mauto\/ig:avif\/https:\/\/yashinfosec.com\/wp-content\/uploads\/2026\/01\/0153-cookies.png 500w\" sizes=\"(max-width: 786px) 100vw, 786px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-ff571d2 elementor-section-boxed elementor-section-height-default elementor-section-height-default wpr-particle-no wpr-jarallax-no wpr-parallax-no wpr-sticky-section-no\" data-id=\"ff571d2\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-6ef2335\" data-id=\"6ef2335\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-6ed2e15 elementor-widget elementor-widget-text-editor\" data-id=\"6ed2e15\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p data-start=\"2099\" data-end=\"2204\">Cookies are small key-value pairs stored by the browser and sent with every request to a matching domain.<\/p><p data-start=\"2206\" data-end=\"2238\">They are commonly used to store:<\/p><ul data-start=\"2239\" data-end=\"2319\"><li data-start=\"2239\" data-end=\"2260\"><p data-start=\"2241\" data-end=\"2260\">Session identifiers<\/p><\/li><li data-start=\"2261\" data-end=\"2284\"><p data-start=\"2263\" data-end=\"2284\">Authentication tokens<\/p><\/li><li data-start=\"2285\" data-end=\"2303\"><p data-start=\"2287\" data-end=\"2303\">User preferences<\/p><\/li><li data-start=\"2304\" data-end=\"2319\"><p data-start=\"2306\" data-end=\"2319\">Tracking data<\/p><\/li><\/ul><h6 data-start=\"2321\" data-end=\"2341\"><span class=\"ez-toc-section\" id=\"Types_of_Cookies\"><\/span>Types of Cookies<span class=\"ez-toc-section-end\"><\/span><\/h6><ul data-start=\"2342\" data-end=\"2539\"><li data-start=\"2342\" data-end=\"2390\"><p data-start=\"2344\" data-end=\"2390\"><strong data-start=\"2344\" data-end=\"2363\">Session cookies<\/strong> \u2192 Deleted on browser close<\/p><\/li><li data-start=\"2391\" data-end=\"2440\"><p data-start=\"2393\" data-end=\"2440\"><strong data-start=\"2393\" data-end=\"2415\">Persistent cookies<\/strong> \u2192 Stored with expiration<\/p><\/li><li data-start=\"2441\" data-end=\"2484\"><p data-start=\"2443\" data-end=\"2484\"><strong data-start=\"2443\" data-end=\"2461\">Secure cookies<\/strong> \u2192 Sent only over HTTPS<\/p><\/li><li data-start=\"2485\" data-end=\"2539\"><p data-start=\"2487\" data-end=\"2539\"><strong data-start=\"2487\" data-end=\"2507\">HttpOnly cookies<\/strong> \u2192 Not accessible via JavaScript<\/p><\/li><\/ul><h6 data-start=\"2541\" data-end=\"2571\"><span class=\"ez-toc-section\" id=\"Why_Cookies_Matter_in_WAPT\"><\/span>Why Cookies Matter in WAPT<span class=\"ez-toc-section-end\"><\/span><\/h6><p data-start=\"2572\" data-end=\"2591\">If an attacker can:<\/p><ul data-start=\"2592\" data-end=\"2645\"><li data-start=\"2592\" data-end=\"2608\"><p data-start=\"2594\" data-end=\"2608\">Steal a cookie<\/p><\/li><li data-start=\"2609\" data-end=\"2627\"><p data-start=\"2611\" data-end=\"2627\">Predict a cookie<\/p><\/li><li data-start=\"2628\" data-end=\"2645\"><p data-start=\"2630\" data-end=\"2645\">Modify a cookie<\/p><\/li><\/ul><p data-start=\"2647\" data-end=\"2705\">They can <strong data-start=\"2656\" data-end=\"2704\">become the user without knowing the password<\/strong>.<\/p><p data-start=\"2707\" data-end=\"2730\">This leads directly to:<\/p><ul data-start=\"2731\" data-end=\"2792\"><li data-start=\"2731\" data-end=\"2750\"><p data-start=\"2733\" data-end=\"2750\">Session hijacking<\/p><\/li><li data-start=\"2751\" data-end=\"2773\"><p data-start=\"2753\" data-end=\"2773\">Privilege escalation<\/p><\/li><li data-start=\"2774\" data-end=\"2792\"><p data-start=\"2776\" data-end=\"2792\">Account takeover<\/p><\/li><\/ul><p data-start=\"2794\" data-end=\"2949\"><strong data-start=\"2797\" data-end=\"2822\">Red flag for testers:<\/strong><br data-start=\"2822\" data-end=\"2825\" \/>Any application that stores sensitive data directly inside cookies (user IDs, roles, permissions) without proper protection.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-96e9300 elementor-section-boxed elementor-section-height-default elementor-section-height-default wpr-particle-no wpr-jarallax-no wpr-parallax-no wpr-sticky-section-no\" data-id=\"96e9300\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-c3aaef6\" data-id=\"c3aaef6\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-b0501cf elementor-widget elementor-widget-heading\" data-id=\"b0501cf\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\"><span class=\"ez-toc-section\" id=\"3_Session_Management\"><\/span>3. Session Management<span class=\"ez-toc-section-end\"><\/span><\/h4>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-82f7dfb elementor-section-boxed elementor-section-height-default elementor-section-height-default wpr-particle-no wpr-jarallax-no wpr-parallax-no wpr-sticky-section-no\" data-id=\"82f7dfb\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-f68a051\" data-id=\"f68a051\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-ac5be87 elementor-widget elementor-widget-text-editor\" data-id=\"ac5be87\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p data-start=\"3057\" data-end=\"3138\">A session represents an <strong data-start=\"3081\" data-end=\"3111\">authenticated conversation<\/strong> between client and server.<\/p><p data-start=\"3140\" data-end=\"3162\">The typical lifecycle:<\/p><ol data-start=\"3163\" data-end=\"3322\"><li data-start=\"3163\" data-end=\"3184\"><p data-start=\"3166\" data-end=\"3184\">User authenticates<\/p><\/li><li data-start=\"3185\" data-end=\"3215\"><p data-start=\"3188\" data-end=\"3215\">Server generates session ID<\/p><\/li><li data-start=\"3216\" data-end=\"3246\"><p data-start=\"3219\" data-end=\"3246\">Session ID stored in cookie<\/p><\/li><li data-start=\"3247\" data-end=\"3280\"><p data-start=\"3250\" data-end=\"3280\">Cookie sent with every request<\/p><\/li><li data-start=\"3281\" data-end=\"3322\"><p data-start=\"3284\" data-end=\"3322\">Server maps session ID \u2192 user identity<\/p><\/li><\/ol><h6 data-start=\"3324\" data-end=\"3353\"><span class=\"ez-toc-section\" id=\"Common_Session_Weaknesses\"><\/span>Common Session Weaknesses<span class=\"ez-toc-section-end\"><\/span><\/h6><ul data-start=\"3354\" data-end=\"3494\"><li data-start=\"3354\" data-end=\"3379\"><p data-start=\"3356\" data-end=\"3379\">Predictable session IDs<\/p><\/li><li data-start=\"3380\" data-end=\"3415\"><p data-start=\"3382\" data-end=\"3415\">Session not invalidated on logout<\/p><\/li><li data-start=\"3416\" data-end=\"3460\"><p data-start=\"3418\" data-end=\"3460\">Same session reused after privilege change<\/p><\/li><li data-start=\"3461\" data-end=\"3494\"><p data-start=\"3463\" data-end=\"3494\">Session survives password reset<\/p><\/li><\/ul><h6 data-start=\"3496\" data-end=\"3515\"><span class=\"ez-toc-section\" id=\"Classic_Attacks\"><\/span>Classic Attacks<span class=\"ez-toc-section-end\"><\/span><\/h6><ul data-start=\"3516\" data-end=\"3682\"><li data-start=\"3516\" data-end=\"3578\"><p data-start=\"3518\" data-end=\"3578\"><strong data-start=\"3518\" data-end=\"3538\">Session fixation<\/strong> \u2192 Attacker sets session ID before login<\/p><\/li><li data-start=\"3579\" data-end=\"3635\"><p data-start=\"3581\" data-end=\"3635\"><strong data-start=\"3581\" data-end=\"3602\">Session hijacking<\/strong> \u2192 Attacker steals active session<\/p><\/li><li data-start=\"3636\" data-end=\"3682\"><p data-start=\"3638\" data-end=\"3682\"><strong data-start=\"3638\" data-end=\"3656\">Session replay<\/strong> \u2192 Old session still valid<\/p><\/li><\/ul><p data-start=\"3684\" data-end=\"3745\"><strong data-start=\"3687\" data-end=\"3706\">Pentester rule:<\/strong><br data-start=\"3706\" data-end=\"3709\" \/>Always test session behavior during:<\/p><ul data-start=\"3746\" data-end=\"3803\"><li data-start=\"3746\" data-end=\"3753\"><p data-start=\"3748\" data-end=\"3753\">Login<\/p><\/li><li data-start=\"3754\" data-end=\"3762\"><p data-start=\"3756\" data-end=\"3762\">Logout<\/p><\/li><li data-start=\"3763\" data-end=\"3779\"><p data-start=\"3765\" data-end=\"3779\">Password reset<\/p><\/li><li data-start=\"3780\" data-end=\"3793\"><p data-start=\"3782\" data-end=\"3793\">Role change<\/p><\/li><li data-start=\"3794\" data-end=\"3803\"><p data-start=\"3796\" data-end=\"3803\">Timeout<\/p><\/li><\/ul><p data-start=\"3805\" data-end=\"3896\">If sessions aren\u2019t rotated or invalidated properly, the application is already compromised.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-505d6d0 elementor-section-boxed elementor-section-height-default elementor-section-height-default wpr-particle-no wpr-jarallax-no wpr-parallax-no wpr-sticky-section-no\" data-id=\"505d6d0\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-c66f8ad\" data-id=\"c66f8ad\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-2c03e5e elementor-widget elementor-widget-heading\" data-id=\"2c03e5e\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h5 class=\"elementor-heading-title elementor-size-default\"><span class=\"ez-toc-section\" id=\"4_Tokens_JWT_API_Tokens_Bearer_Auth\"><\/span>4. Tokens (JWT, API Tokens, Bearer Auth)<span class=\"ez-toc-section-end\"><\/span><\/h5>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-d722df8 elementor-section-boxed elementor-section-height-default elementor-section-height-default wpr-particle-no wpr-jarallax-no wpr-parallax-no wpr-sticky-section-no\" data-id=\"d722df8\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-f27e16c\" data-id=\"f27e16c\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-daed0a7 elementor-widget__width-initial elementor-widget elementor-widget-image\" data-id=\"daed0a7\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img data-opt-id=1161102046  data-opt-src=\"https:\/\/mlefs6wcwvfi.i.optimole.com\/w:1024\/h:477\/q:mauto\/ig:avif\/https:\/\/yashinfosec.com\/wp-content\/uploads\/2026\/01\/json-web-token.png\"  decoding=\"async\" width=\"1024\" height=\"477\" src=\"data:image/svg+xml,%3Csvg%20viewBox%3D%220%200%201024%20477%22%20width%3D%221024%22%20height%3D%22477%22%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%3E%3Crect%20width%3D%221024%22%20height%3D%22477%22%20fill%3D%22transparent%22%2F%3E%3C%2Fsvg%3E\" class=\"attachment-large size-large wp-image-632\" alt=\"\" old-srcset=\"https:\/\/mlefs6wcwvfi.i.optimole.com\/w:1920\/h:894\/q:mauto\/ig:avif\/https:\/\/yashinfosec.com\/wp-content\/uploads\/2026\/01\/json-web-token.png 2400w, https:\/\/mlefs6wcwvfi.i.optimole.com\/w:300\/h:140\/q:mauto\/ig:avif\/https:\/\/yashinfosec.com\/wp-content\/uploads\/2026\/01\/json-web-token.png 300w, https:\/\/mlefs6wcwvfi.i.optimole.com\/w:1024\/h:477\/q:mauto\/ig:avif\/https:\/\/yashinfosec.com\/wp-content\/uploads\/2026\/01\/json-web-token.png 1024w, https:\/\/mlefs6wcwvfi.i.optimole.com\/w:768\/h:358\/q:mauto\/ig:avif\/https:\/\/yashinfosec.com\/wp-content\/uploads\/2026\/01\/json-web-token.png 768w, https:\/\/mlefs6wcwvfi.i.optimole.com\/w:1536\/h:716\/q:mauto\/ig:avif\/https:\/\/yashinfosec.com\/wp-content\/uploads\/2026\/01\/json-web-token.png 1536w, https:\/\/mlefs6wcwvfi.i.optimole.com\/w:1920\/h:894\/q:mauto\/ig:avif\/https:\/\/yashinfosec.com\/wp-content\/uploads\/2026\/01\/json-web-token.png 2048w, https:\/\/mlefs6wcwvfi.i.optimole.com\/w:900\/h:419\/q:mauto\/ig:avif\/https:\/\/yashinfosec.com\/wp-content\/uploads\/2026\/01\/json-web-token.png 900w, https:\/\/mlefs6wcwvfi.i.optimole.com\/w:500\/h:233\/q:mauto\/ig:avif\/https:\/\/yashinfosec.com\/wp-content\/uploads\/2026\/01\/json-web-token.png 500w\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-3b2b88d elementor-section-boxed elementor-section-height-default elementor-section-height-default wpr-particle-no wpr-jarallax-no wpr-parallax-no wpr-sticky-section-no\" data-id=\"3b2b88d\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-5585d34\" data-id=\"5585d34\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-8a7b7a6 elementor-widget elementor-widget-text-editor\" data-id=\"8a7b7a6\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p data-start=\"3992\" data-end=\"4081\">Modern applications increasingly use <strong data-start=\"4029\" data-end=\"4059\">token-based authentication<\/strong>, especially for APIs.<\/p><h6 data-start=\"4083\" data-end=\"4105\"><span class=\"ez-toc-section\" id=\"Common_Token_Types\"><\/span>Common Token Types<span class=\"ez-toc-section-end\"><\/span><\/h6><ul data-start=\"4106\" data-end=\"4162\"><li data-start=\"4106\" data-end=\"4129\"><p data-start=\"4108\" data-end=\"4129\">JWT (JSON Web Tokens)<\/p><\/li><li data-start=\"4130\" data-end=\"4151\"><p data-start=\"4132\" data-end=\"4151\">OAuth access tokens<\/p><\/li><li data-start=\"4152\" data-end=\"4162\"><p data-start=\"4154\" data-end=\"4162\">API keys<\/p><\/li><\/ul><p data-start=\"4164\" data-end=\"4187\">JWTs typically contain:<\/p><ul data-start=\"4188\" data-end=\"4239\"><li data-start=\"4188\" data-end=\"4208\"><p data-start=\"4190\" data-end=\"4208\">Header (algorithm)<\/p><\/li><li data-start=\"4209\" data-end=\"4227\"><p data-start=\"4211\" data-end=\"4227\">Payload (claims)<\/p><\/li><li data-start=\"4228\" data-end=\"4239\"><p data-start=\"4230\" data-end=\"4239\">Signature<\/p><\/li><\/ul><h6 data-start=\"4241\" data-end=\"4269\"><span class=\"ez-toc-section\" id=\"Why_Tokens_Are_Dangerous\"><\/span>Why Tokens Are Dangerous<span class=\"ez-toc-section-end\"><\/span><\/h6><p data-start=\"4270\" data-end=\"4294\">Developers often assume:<\/p><blockquote data-start=\"4295\" data-end=\"4327\"><p data-start=\"4297\" data-end=\"4327\">\u201cIt\u2019s signed, so it\u2019s secure.\u201d<\/p><\/blockquote><p data-start=\"4329\" data-end=\"4352\">Pentesters know better.<\/p><p data-start=\"4354\" data-end=\"4374\">Common token issues:<\/p><ul data-start=\"4375\" data-end=\"4485\"><li data-start=\"4375\" data-end=\"4400\"><p data-start=\"4377\" data-end=\"4400\">Weak signing algorithms<\/p><\/li><li data-start=\"4401\" data-end=\"4427\"><p data-start=\"4403\" data-end=\"4427\">No expiration validation<\/p><\/li><li data-start=\"4428\" data-end=\"4455\"><p data-start=\"4430\" data-end=\"4455\">Excessive data in payload<\/p><\/li><li data-start=\"4456\" data-end=\"4485\"><p data-start=\"4458\" data-end=\"4485\">Trusting client-side claims<\/p><\/li><\/ul><p data-start=\"4487\" data-end=\"4620\">If a backend trusts token claims like <code data-start=\"4525\" data-end=\"4537\">role=admin<\/code> without verifying authorization server-side, privilege escalation becomes trivial.<\/p><p data-start=\"4622\" data-end=\"4719\"><strong data-start=\"4625\" data-end=\"4647\">Pentester mindset:<\/strong><br data-start=\"4647\" data-end=\"4650\" \/>Tokens are <strong data-start=\"4661\" data-end=\"4675\">assertions<\/strong>, not truth.<br data-start=\"4687\" data-end=\"4690\" \/>Every claim must be verified.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-9ce5073 elementor-section-boxed elementor-section-height-default elementor-section-height-default wpr-particle-no wpr-jarallax-no wpr-parallax-no wpr-sticky-section-no\" data-id=\"9ce5073\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-7c3ac89\" data-id=\"7c3ac89\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-cda629a elementor-widget elementor-widget-heading\" data-id=\"cda629a\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h5 class=\"elementor-heading-title elementor-size-default\"><span class=\"ez-toc-section\" id=\"5_Authentication_Logic_Flaws\"><\/span>5. Authentication Logic Flaws<span class=\"ez-toc-section-end\"><\/span><\/h5>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-8927e2c elementor-section-boxed elementor-section-height-default elementor-section-height-default wpr-particle-no wpr-jarallax-no wpr-parallax-no wpr-sticky-section-no\" data-id=\"8927e2c\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-a789236\" data-id=\"a789236\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-47a27c1 elementor-widget__width-initial elementor-widget elementor-widget-image\" data-id=\"47a27c1\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img data-opt-id=920606297  data-opt-src=\"https:\/\/mlefs6wcwvfi.i.optimole.com\/w:881\/h:617\/q:mauto\/ig:avif\/https:\/\/yashinfosec.com\/wp-content\/uploads\/2026\/01\/auth.png\"  loading=\"lazy\" decoding=\"async\" width=\"881\" height=\"617\" src=\"data:image/svg+xml,%3Csvg%20viewBox%3D%220%200%20881%20617%22%20width%3D%22881%22%20height%3D%22617%22%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%3E%3Crect%20width%3D%22881%22%20height%3D%22617%22%20fill%3D%22transparent%22%2F%3E%3C%2Fsvg%3E\" class=\"attachment-large size-large wp-image-633\" alt=\"\" old-srcset=\"https:\/\/mlefs6wcwvfi.i.optimole.com\/w:881\/h:617\/q:mauto\/ig:avif\/https:\/\/yashinfosec.com\/wp-content\/uploads\/2026\/01\/auth.png 881w, https:\/\/mlefs6wcwvfi.i.optimole.com\/w:300\/h:210\/q:mauto\/ig:avif\/https:\/\/yashinfosec.com\/wp-content\/uploads\/2026\/01\/auth.png 300w, https:\/\/mlefs6wcwvfi.i.optimole.com\/w:768\/h:538\/q:mauto\/ig:avif\/https:\/\/yashinfosec.com\/wp-content\/uploads\/2026\/01\/auth.png 768w, https:\/\/mlefs6wcwvfi.i.optimole.com\/w:500\/h:350\/q:mauto\/ig:avif\/https:\/\/yashinfosec.com\/wp-content\/uploads\/2026\/01\/auth.png 500w\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-322560a elementor-section-boxed elementor-section-height-default elementor-section-height-default wpr-particle-no wpr-jarallax-no wpr-parallax-no wpr-sticky-section-no\" data-id=\"322560a\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-bc6cfdb\" data-id=\"bc6cfdb\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-f596a20 elementor-widget elementor-widget-text-editor\" data-id=\"f596a20\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p data-start=\"4827\" data-end=\"4850\">Logic flaws occur when:<\/p><ul data-start=\"4851\" data-end=\"4929\"><li data-start=\"4851\" data-end=\"4873\"><p data-start=\"4853\" data-end=\"4873\">Steps can be skipped<\/p><\/li><li data-start=\"4874\" data-end=\"4897\"><p data-start=\"4876\" data-end=\"4897\">Order is not enforced<\/p><\/li><li data-start=\"4898\" data-end=\"4929\"><p data-start=\"4900\" data-end=\"4929\">State transitions are assumed<\/p><\/li><\/ul><p data-start=\"4931\" data-end=\"4940\">Examples:<\/p><ul data-start=\"4941\" data-end=\"5065\"><li data-start=\"4941\" data-end=\"4987\"><p data-start=\"4943\" data-end=\"4987\">Accessing <code data-start=\"4953\" data-end=\"4965\">\/dashboard<\/code> directly after signup<\/p><\/li><li data-start=\"4988\" data-end=\"5025\"><p data-start=\"4990\" data-end=\"5025\">Reusing reset tokens multiple times<\/p><\/li><li data-start=\"5026\" data-end=\"5065\"><p data-start=\"5028\" data-end=\"5065\">Changing user ID parameter post-login<\/p><\/li><\/ul><p data-start=\"5067\" data-end=\"5135\">These issues don\u2019t trigger alerts.<br data-start=\"5101\" data-end=\"5104\" \/>They silently hand over access.<\/p><p data-start=\"5137\" data-end=\"5218\"><strong data-start=\"5140\" data-end=\"5152\">Reality:<\/strong><br data-start=\"5152\" data-end=\"5155\" \/>Most high-impact authentication bugs are invisible to scanners.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Day 2 \u2013 WAPT Foundations If Day 1 was about how the web works,Day 2 is about how identity is established, maintained,<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"iawp_total_views":25,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-626","post","type-post","status-publish","format-standard","hentry","category-cybersecurity","col-md-12"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Authentication, Sessions &amp; Cookies Explained for Web Pentesters - yashinfosec.com<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, 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