Vulnerability details

CVE-2025-59841

FlagForgeCTF flagForge

FlagForgeCTF's Improper Session Handling Allows Access After Logout

CVSS 3.1

9.8Critical

Official 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.

CVSS scores

Score	Version	Source	Vector
9.8Critical	3.1	CVEProject cvelistV5 (CNA) (GitHub_M)	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`

Affected products

Vendor	Product	Versions	Source
FlagForgeCTF	flagForge	>= 2.2.0, < 2.3.1	CVEProject cvelistV5 (CNA)

References and advisories

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

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Details

Published: 2025-09-25
Last updated: 2025-09-29
State: Published
Assigner (CNA): GitHub_M

Exploit prediction (EPSS)

0.39%

Probability of exploitation in 30 days

33.7%

Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable: Yes
Exploitation: None
Technical impact: Total

Weaknesses (CWE)

CWE-384
Session Fixation
CWE-613
Insufficient Session Expiration