Vulnerability in GitLab
CVE-2025-12983
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 16.9 before 18.3.6, 18.4 before 18.4.4, and 18.5 before 18.5.2 that could have allowed an authenticated attacker to cause a denial of service condition by submitting specially crafted markdown content with nested formatting patterns.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 3.5 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:L.
EPSS exploit prediction
EPSS: 0.004 (33.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 34th percentile — 33.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- GitLab — versions 16.9, 18.4, 18.5
Weakness classification (CWE)
References
- about.gitlab.com/releases/2025/11/12/patch-release-gitlab-18-5-2-released/ (Release Notes, Vendor Advisory)
- gitlab.com/gitlab-org/gitlab/-/issues/296257 (issue-tracking, permissions-required, Broken Link)
- hackerone.com/reports/3419588 (Permissions Required, technical-description, permissions-required, exploit)
Frequently asked questions
- What is CVE-2025-12983?
- CVE-2025-12983 is a low-severity vulnerability in GitLab, classified under CWE-789. CVSS score: 3.5/10. Published 2025-11-15.
- How severe is CVE-2025-12983?
- Low severity. CVSS v3 base score is 3.5 out of 10.