# Authentication & Session Management Flaws

> Master web authentication and session management vulnerabilities. Learn to exploit weak passwords, predictable tokens, session fixation, insecure cookies, and JWT flaws.

Canonical: https://codelivly.com/rooms/authentication-session-management-flaws
Last updated: 2026-07-29

| | |
|---|---|
| Level | Intermediate |
| Category | Cybersecurity |
| Lessons | 7 |
| Estimated time | 1 h |
| XP | 110 |

A comprehensive module covering the critical flaws in web application authentication and session management. Explore how weak password policies lead to credential stuffing, analyze session token entropy, execute session fixation attacks, and exploit missing cookie security flags. Conclude with deep dives into JSON Web Token (JWT) vulnerabilities and a guided lab on hijacking sessions via token manipulation.

## Lessons

1. What is Authentication vs Session Management (30 min)
2. Weak Password Policies & Credential Attacks on Login Forms (30 min)
3. Session Token Analysis (30 min)
4. Session Fixation Attacks (30 min)
5. Cookie Security Flags (30 min)
6. JWT (JSON Web Token) Vulnerabilities (30 min)
7. Guided Lab: Hijacking a Session via Token Manipulation (30 min)

## Related

- [Learning path: Web Application Security](https://codelivly.com/learning-paths/web-application-security)
- [All rooms](https://codelivly.com/rooms)