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CVE-2025-59841

Flagforge vulnerability

9.8 CRITICALEPSS 0.42%
  1. Published25 Sept 2025

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 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Flagforge≥ 2.2 < 2.3.1

Remediation

Fixed in
Flagforge≥ 2.3.1

References

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Frequently asked

Is CVE-2025-59841 being actively exploited?

CVE-2025-59841 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.42%.

How severe is CVE-2025-59841?

CVE-2025-59841 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 0.42% probability of exploitation.

Which products are affected by CVE-2025-59841?

Affected products include Flagforge.

How do I fix CVE-2025-59841?

Upgrade affected software to a fixed version, for example Flagforge 2.3.1 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2025-59841 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.