CVE•Published 2025-09-25•Modified 2026-10-11•1 article on news•6 live references•NVD data
CVE-2025-59841Flagforge · Flagforge
Vulnerability data via NVD (ingested)
CVSS v3.1
9.8
CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS percentile
35
Exploit Prediction Scoring System · top 65% of all CVEs
Weaknesses (CWE)
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.
Timeline
Published 2025-09-25
Modified 2026-10-11
External references
Search for exposed instances
Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).
Shodan · vuln tag0 hosts
vuln:CVE-2025-59841Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · product
product:"Flagforge Flagforge"All exposed Flagforge Flagforge instances — cross-reference with the CVE's affected-version range.
Shodan · banner/body mention
http.html:"Flagforge"HTTP body or banner mentions "Flagforge" — catches deploys Shodan didn't identify as a product.
More intel sources (5)
Shodan report
vuln:CVE-2025-59841Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2025-59841Censys host search filtered to this CVE id.
grep.app
CVE-2025-59841Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2025-59841GitHub code search for direct mentions.
Google dork
"CVE-2025-59841" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub
No public proof-of-concept repositories found for CVE-2025-59841 on GitHub.