Information disclosure in Flagforge
CVE-2025-59833
Flag Forge is a Capture The Flag (CTF) platform. In versions from 2.1.0 to before 2.3.0, the API endpoint GET /api/problems/:id returns challenge hints in plaintext within the question object, regardless of whether the user has unlocked th…
Vulnerability class: Information Disclosure
EPSS: 0.003 (24.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
Affected products
- Flagforge
- Flagforgectf Flagforge — versions >= 2.1.0, < 2.3.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)
Frequently asked questions
- What is CVE-2025-59833?
- CVE-2025-59833 is a high-severity vulnerability in Flagforge, classified under Information Disclosure. CVSS score: 7.5/10. Published 2025-09-24.
- How severe is CVE-2025-59833?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2025-59833 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.