portswigger.net/research· Mar 18, 2025

SAML roulette: the hacker always wins

Open Original Article ↗
Introduction In this post, we’ll show precisely how to chain round-trip attacks and namespace confusion to achieve unauthenticated admin access on GitLab Enterprise by exploiting the ruby-saml library
🎯 Vulnerability: Web Security Vulnerability
💡 Defense Fix: Implement strict input validation, contextual output encoding, and enforce least-privilege authorization controls.