What is the CVSS score of CVE-2025-59841?

CVE-2025-59841 has a CVSS 3.1 base score of 9.8 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.1%.

Which versions of Session Fixation are affected by CVE-2025-59841?

Organizations using versions from 2.2.0 to face critical risk from CVE-2025-59841 rated CVSS 9.8.. A patch is available.

How to fix or mitigate CVE-2025-59841?

Within 7 days: Identify all affected systems running versions from 2.2.0 to and apply vendor patches promptly. Vendor patch is available.

Session Fixation CVE-2025-59841

CRITICAL

Session Fixation (CWE-384)

2025-09-25 security-advisories@github.com

CSRF Session Fixation Flagforge

9.8

CVSS 3.1 · GitHub Advisory

Severity by source

GitHub Advisory PRIMARY

9.8 CRITICAL

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Primary rating from GitHub Advisory · only source for this CVE.

CVSS VectorGitHub Advisory

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 19:14 vuln.today

Patch released

Mar 28, 2026 - 19:14 nvd

Patch available

CVE Published

Sep 25, 2025 - 16:15 nvd

CRITICAL 9.8

DescriptionGitHub Advisory

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.

AnalysisAI

Flag Forge is a Capture The Flag (CTF) platform. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity.

Technical ContextAI

This vulnerability is classified under CWE-384. 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. Affected products include: Flagforge. Version information: before 2.3.1.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.