SSRF via OpenID dynamic client registration

Platform: PortSwigger | Category: Oauth | Type: Lab | Difficulty: N/A | OS: N/A | Author: XESXOR | Date: 2026-08-24 | Status: Solved Techniques: Web Security Academy, Oauth

Summary

Walkthrough of the PortSwigger Web Security Academy lab SSRF via OpenID dynamic client registration (Oauth). This lab demonstrates a oauth vulnerability and its exploitation to achieve the lab objectives.

Lab Overview

PortSwigger Web Security Academy — Oauth

This writeup is part of the XESXOR PortSwigger collection. The original lab description and solution have been preserved and reformatted for clarity.

Lab Description :

Solution :

Key Takeaways / Lessons

• Understanding Oauth detection and exploitation is crucial for web security.
• Always validate and sanitize user input; implement proper access controls.
• This lab is part of the PortSwigger Web Security Academy — practice in a safe, legal environment.

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Crafted by XESXOR Research • 2026-08-24 • PortSwigger Web Security Academy • Lab: SSRF via OpenID dynamic client registration