What’s Vulnerable › Vulnerabilities

CVE-2025-61777: FlagForge Allows Unauthenticated Badge Template API Access

• Severity: critical (CVSS 9.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-10-06 · updated 2026-10-09
• Weakness: CWE-200

Description

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.

Affected products

• FlagForgeCTF flagForge: from 2.0 before 2.3.2 — fixed in 2.3.2

How to fix

Upgrade to a fixed version: FlagForgeCTF flagForge 2.3.2. Check the vendor advisory for mitigations.

References

• https://github.com/FlagForgeCTF/flagForge/commit/e2121c5fb7a512a49dcd875812c944265fb1a846
• https://github.com/FlagForgeCTF/flagForge/security/advisories/GHSA-26rx-c53q-rjf9

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