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OpenAdvisories
Critical · 9.8 CVE-2025-59841 EUVD-2025-31126

FlagForgeCTF's Improper Session Handling Allows Access After Logout

Published Sep 25, 2025 · Updated Sep 29, 2025 · Assigned by GitHub_M

Description

Flag Forge is a Capture The Flag (CTF) platform. In versions from 2.2.0 to before 2.3.1, the FlagForge web application improperly handles session invalidation. Authenticated users can continue to access protected endpoints, such as /api/profile, even after logging out. CSRF tokens are also still valid post-logout, which can allow unauthorized actions. This issue has been patched in version 2.3.1.

Affected products

VendorProductAffectedFixed
FlagForgeCTF flagForge >= 2.2.0, < 2.3.1 —

References