CVE-2021-39888

Severity: medium (CVSS 4.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.2% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2021-10-05 · updated 2026-06-17

Description

In all versions of GitLab EE starting from 13.10 before 14.1.7, all versions starting from 14.2 before 14.2.5, and all versions starting from 14.3 before 14.3.1 a specific API endpoint may reveal details about a private group and other sensitive info inside issue and merge request templates.

Affected products

GitLab: from 13.10.0 before 14.1.7; from 14.2.0 before 14.2.5; 14.3.0 — fixed in 14.1.7, 14.2.5

How to fix

Upgrade to a fixed version: GitLab 14.1.7, 14.2.5. Check the vendor advisory for mitigations.

References

https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39888.json
https://gitlab.com/gitlab-org/gitlab/-/issues/336446
https://hackerone.com/reports/1255128
https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39888.json
https://gitlab.com/gitlab-org/gitlab/-/issues/336446
https://hackerone.com/reports/1255128

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