CVE-2025-59841CRITICAL 9.8EPSS p30.2%

CVE-2025-59841CVE-2025-59841

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.

Scoring

CVSS 3.19.8 (CRITICAL)
VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS0.39% probability of exploitation · percentile 30.2% · 2026-06-19T12:03:05Z
Published2025-09-25
Last modified2025-10-08

Underlying weaknesses· 2

CWE-384CWE-613

References

  1. https://github.com/FlagForgeCTF/flagForge/commit/304b6c82a4f76871b336404b91e5cdd8a7d7d5bd
  2. https://github.com/FlagForgeCTF/flagForge/security/advisories/GHSA-h6pr-4cwv-6cjg

2

TypeTargetConfidenceTier
WeaknessSession Fixationcwe-3840%live
WeaknessInsufficient Session Expirationcwe-6130%live

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Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.