FlagForgeCTF vulnerabilities
Published CVEs affecting FlagForgeCTF products: 6 record(s), with severity, exploitation and fixes.
CVE-2026-21868
High · 7.5
CWE-1333 Jan 7, 2026
Flag Forge has ReDoS Vulnerability in User Profile Lookup API
Flag Forge is a Capture The Flag (CTF) platform. Versions 2.3.2 and below have a Regular Expression Denial of Service (ReDoS) vulnerability in the user profile API endpoint (/api/user/[username]). The application constructs a regular expression dynamically using unescaped user input (the username parameter). An attacker can exploit this by sending a specially crafted username containing regex meta-characters (e.g., deeply nested groups or quantifiers), causing the MongoDB regex engine to consume excessive CPU resources. This can lead to Denial of Service for other users. The issue is fixed in version 2.3.3. To workaround this issue, implement a Web Application Firewall (WAF) rule to block requests containing regex meta-characters in the URL path.
CVE-2025-61777
Critical · 9.1
CWE-306 Oct 6, 2025
FlagForge Allows Unauthenticated Badge Template API Access
Flag Forge is a Capture The Flag (CTF) platform. Starting in version 2.0.0 and prior to version 2.3.2, the `/api/admin/badge-templates` (GET) and `/api/admin/badge-templates/create` (POST) endpoints previously allowed access without authentication or authorization. This could have enabled unauthorized users to retrieve all badge templates and sensitive metadata (createdBy, createdAt, updatedAt) and/or create arbitrary badge templates in the database. This could lead to data exposure, database pollution, or abuse of the badge system. The issue has been fixed in FlagForge v2.3.2. GET, POST, UPDATE, and DELETE endpoints now require authentication. Authorization checks ensure only admins can access and modify badge templates. No reliable workarounds are available.
CVE-2025-59932
High · 8.2
CWE-284 Sep 26, 2025
FlagForgeCTF Unauthenticated Resource Modification/Deletion
Flag Forge is a Capture The Flag (CTF) platform. From versions 2.0.0 to before 2.3.1, the /api/resources endpoint previously allowed POST and DELETE requests without proper authentication or authorization. This could have enabled unauthorized users to create, modify, or delete resources on the platform. The issue has been fixed in FlagForge version 2.3.1.
CVE-2025-59843
Medium · 5.3
CWE-359 Sep 26, 2025
FlagForgeCTF Exposes User Emails via Public /api/user/[username] API
Flag Forge is a Capture The Flag (CTF) platform. From versions 2.0.0 to before 2.3.2, the public endpoint /api/user/[username] returns user email addresses in its JSON response. The fix, intended for release in 2.3.1 but only available starting in version 2.3.2, removes email addresses from public API responses while keeping the endpoint publicly accessible. Users should upgrade to version 2.3.2 or later to eliminate exposure. There are no workarounds for this vulnerability.
CVE-2025-59841
Critical · 9.8
CWE-384 Sep 25, 2025
FlagForgeCTF's Improper Session Handling Allows Access After Logout
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.
CVE-2025-59826
High · 7.6
CWE-862 Sep 23, 2025
FlagForgeCTF Vulnerable to Unauthorized Problem Creation
Flag Forge is a Capture The Flag (CTF) platform. In version 2.1.0, non-admin users can create arbitrary challenges, potentially introducing malicious, incorrect, or misleading content. This issue has been patched in version 2.2.0.