What is CVE-2023-3907?

CVE-2023-3907 is a medium-severity vulnerability in GitLab, classified under CWE-286. CVSS score: 4.9/10. Published 2023-12-17.

How severe is CVE-2023-3907?

Medium severity. CVSS v3 base score is 4.9 out of 10.

Vulnerability in GitLab

CVE-2023-3907

A privilege escalation vulnerability in GitLab EE affecting all versions from 16.0 prior to 16.4.4, 16.5 prior to 16.5.4, and 16.6 prior to 16.6.2 allows a project Maintainer to use a Project Access Token to escalate their role to Owner

Published 2023-12-17 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.9 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N.

EPSS exploit prediction

EPSS: 0.007 (50.6th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 51st percentile — 50.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000

Affected products

GitLab — versions 16.0, 16.5, 16.6

Weakness classification (CWE)

CWE-286

References

gitlab.com/gitlab-org/gitlab/-/issues/418878 (issue-tracking, permissions-required, Issue Tracking, Vendor Advisory)
hackerone.com/reports/2058934 (Permissions Required, technical-description, permissions-required, exploit)

Frequently asked questions

What is CVE-2023-3907?: CVE-2023-3907 is a medium-severity vulnerability in GitLab, classified under CWE-286. CVSS score: 4.9/10. Published 2023-12-17.
How severe is CVE-2023-3907?: Medium severity. CVSS v3 base score is 4.9 out of 10.