CVE-2025-59841
Critical
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.
SeverityCritical
CVSS9.8
Exploit probability—
ProductFlagforge
PublishedSep 25, 2025
First seenSep 25, 2025
Weakness typeCWE-384CWE-384CWE-613CWE-613
How to fix
Update
- flagforge flagforge2.3.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| flagforge flagforge | 2.2 ≤ v < 2.3.1 | 2.3.1 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.