picoctf-2025-unsafe-eval-writeup

picoCTF 2025 — Unssafe Eval Web Exploitation Challenge:...

CVE-2024-52289 authentik has an insecure default configuration for OAuth2 Redirect URIs

authentik is an open-source identity provider. Redirect URIs in the OAuth2 provider in authentik are checked by RegEx comparison. When no Redirect URIs are configured in a provider, authentik will automatically use the first redirecturi value received as an allowed redirect URI, without escaping...