Vulnerability in GitLab
CVE-2023-3994
An issue has been discovered in GitLab CE/EE affecting all versions starting from 9.3 before 16.0.8, all versions starting from 16.1 before 16.1.3, all versions starting from 16.2 before 16.2.2. A Regular Expression Denial of Service was possible via sending crafted payloads which use ProjectReferenceFilter to the preview_markdown endpoint.
Vulnerability class: ReDoS (Regular Expression Denial of Service)
Published · last modified .
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:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.010 (59.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 60th percentile — 59.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000
Affected products
- GitLab — versions 9.3, 16.1, 16.2
Weakness classification (CWE)
References
- gitlab.com/gitlab-org/gitlab/-/issues/416225 (issue-tracking, permissions-required, Broken Link)
- hackerone.com/reports/1963255 (Permissions Required, technical-description, permissions-required, exploit)
Frequently asked questions
- What is CVE-2023-3994?
- CVE-2023-3994 is a high-severity vulnerability in GitLab, classified under Inefficient Regular Expression Complexity. CVSS score: 7.5/10. Published 2023-08-02.
- How severe is CVE-2023-3994?
- High severity. CVSS v3 base score is 7.5 out of 10.