JWT authentication bypass via unverified signature — Portswigger Simple Solution Writeup | 2023

JWT authentication bypass via unverified signature — Portswigger Simple Solution Writeup | 2023

Portswigger Lab Solution — JWT Authentication Bypass by Karthikeyan Nagaraj

Lab Link:

JWT attacks | Web Security Academy

Lab Description:

This lab uses a JWT-based mechanism for handling sessions. Due to implementation flaws, the server doesn’t verify the signature of any JWTs that it receives.

To solve the lab, modify your session token to gain access to the admin panel at /admin, then delete the user carlos. …

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