CVE-2025-59841

FlagForgeCTF's Improper Session Handling Allows Access After Logout

Published Sep 25, 2025 CVSS 3.1 · 9.8 Critical EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2025-31126 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.
History
Type Values Removed Values Added
First Time appeared Flagforge
Flagforge flagforge
CPEs cpe:2.3:a:flagforge:flagforge:*:*:*:*:*:*:*:*
Vendors & Products Flagforge
Flagforge flagforge
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Flagforgectf
Flagforgectf flagforge
Vendors & Products Flagforgectf
Flagforgectf flagforge
Type Values Removed Values Added
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.
Title FlagForgeCTF's Improper Session Handling Allows Access After Logout
Weaknesses CWE-384
CWE-613
References
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Sep 29, 2025, 3:48 PM
Reserved
Sep 22, 2025, 2:34 PM
Status
Analyzed
Published
Sep 25, 2025, 4:15 PM
Modified
Oct 11, 2026, 8:10 PM