FlagForgeCTF’s Improper Session Handling Allows Access After Logout_CVE-2025-59841

9.8 / 10

CRITICAL

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

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.

Basic Information

ID CVE-2025-59841

Source GitHub_M

Published Sep 25, 2025 at 15:15

Affected Product

Vendor FlagForgeCTF

Product flagForge

Version >= 2.2.0, < 2.3.1

Affected Versions FlagForgeCTF flagForge >= 2.2.0, < 2.3.1

CWE Classification

CWE-384 CWE-613

References

{
    "lastseen": "",
    "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.",
    "published": "2025-09-25T15:15:45.438Z",
    "modified": "2025-09-25T15:15:45.438Z",
    "type": "cve",
    "title": "FlagForgeCTF's Improper Session Handling Allows Access After Logout",
    "source": "GitHub_M",
    "references": "https://github.com/FlagForgeCTF/flagForge/security/advisories/GHSA-h6pr-4cwv-6cjg\nhttps://github.com/FlagForgeCTF/flagForge/commit/304b6c82a4f76871b336404b91e5cdd8a7d7d5bd",
    "id": "CVE-2025-59841",
    "bulletinFamily": "",
    "cwe": [
        "CWE-384",
        "CWE-613"
    ],
    "cvelist": null,
    "sourceData": "FlagForgeCTF flagForge >= 2.2.0, < 2.3.1",
    "sourceHref": "",
    "cvss": {
        "score": 9.8,
        "severity": "CRITICAL",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "flagForge",
    "version": ">= 2.2.0, < 2.3.1",
    "vendor": "FlagForgeCTF",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}