CVE-2021-39916

Severity: medium (CVSS 4.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-12-13 · updated 2026-06-17
Weakness: CWE-639

Description

Lack of an access control check in the External Status Check feature allowed any authenticated user to retrieve the configuration of any External Status Check in GitLab EE 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.

Affected products

GitLab: from 14.1.0 before 14.3.6; from 14.4.0 before 14.4.4; from 14.5.0 before 14.5.2 — fixed in 14.3.6, 14.4.4, 14.5.2

How to fix

Upgrade to a fixed version: GitLab 14.3.6, 14.4.4, 14.5.2. Check the vendor advisory for mitigations.

References

https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39916.json
https://gitlab.com/gitlab-org/gitlab/-/issues/343379
https://hackerone.com/reports/1372216
https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39916.json
https://gitlab.com/gitlab-org/gitlab/-/issues/343379
https://hackerone.com/reports/1372216

Get alerted when CVE-2021-39916 or the next vulnerability affects your stack