Auth bypass in GitLab
CVE-2021-39904
An Improper Access Control vulnerability in the GraphQL API in all versions of GitLab CE/EE starting from 13.1 before 14.2.6, all versions starting from 14.3 before 14.3.4, and all versions starting from 14.4 before 14.4.1 allows a Merge Request creator to resolve discussions and apply suggestions after a project owner has locked the Merge Request
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N.
EPSS exploit prediction
EPSS: 0.008 (56.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 57th percentile — 56.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000
Affected products
- GitLab — versions >=13.1, <14.2.6, 14.4.0, >=14.3, <14.3.4
Weakness classification (CWE)
References
- gitlab.com/gitlab-org/gitlab/-/issues/295298 (Exploit, Issue Tracking, Vendor Advisory)
- hackerone.com/reports/1063420 (Permissions Required, Third Party Advisory)
- gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39904.json (Vendor Advisory)
Frequently asked questions
- What is CVE-2021-39904?
- CVE-2021-39904 is a medium-severity vulnerability in GitLab, classified under Incorrect Authorization. CVSS score: 4.3/10. Published 2021-11-05.
- How severe is CVE-2021-39904?
- Medium severity. CVSS v3 base score is 4.3 out of 10.