Auth bypass in GitLab
CVE-2021-39943
An authorization logic error in the External Status Check API in GitLab EE affecting all versions starting from 14.1 before 14.3.6, all versions starting from 14.4 before 14.4.4, all versions starting from 14.5 before 14.5.2, allowed a user to update the status of the check via an API call
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: 0.009 (57.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 57th percentile — 57.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000
Affected products
- GitLab — versions >=14.5.0, <14.5.2, >=14.4.0, <14.4.4, >=14.1.0, <14.3.6
Weakness classification (CWE)
References
- gitlab.com/gitlab-org/gitlab/-/issues/343604 (Broken Link)
- hackerone.com/reports/1375393 (Permissions Required, Third Party Advisory)
- gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39943.json (Vendor Advisory)
Frequently asked questions
- What is CVE-2021-39943?
- CVE-2021-39943 is a medium-severity vulnerability in GitLab, classified under Incorrect Authorization. CVSS score: 4.3/10. Published 2022-02-09.
- How severe is CVE-2021-39943?
- Medium severity. CVSS v3 base score is 4.3 out of 10.