Auth bypass in GitLab
CVE-2021-39872
In all versions of GitLab CE/EE since version 14.1, an improper access control vulnerability allows users with expired password to still access GitLab through git and API through access tokens acquired before password expiration.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.010 (61.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 61st percentile — 61.0% 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 4.3.0, >=14.1, <14.1.7, >=14.3, <14.3.1
Weakness classification (CWE)
References
- gitlab.com/gitlab-org/gitlab/-/issues/337954 (Broken Link)
- hackerone.com/reports/1285226 (Permissions Required, Third Party Advisory)
- gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39872.json (Vendor Advisory)
Frequently asked questions
- What is CVE-2021-39872?
- CVE-2021-39872 is a medium-severity vulnerability in GitLab, classified under Improper Authentication. CVSS score: 6.5/10. Published 2021-10-05.
- How severe is CVE-2021-39872?
- Medium severity. CVSS v3 base score is 6.5 out of 10.