CVE-2021-39897

Severity: medium (CVSS 5.3 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: none known
Published: 2021-11-05 · updated 2026-06-17
Weakness: CWE-281

Description

Improper access control in GitLab CE/EE version 10.5 and above allowed subgroup members with inherited access to a project from a parent group to still have access even after the subgroup is transferred

Affected products

GitLab: from 12.9.0 before 12.9.8; from 12.10.0 before 12.10.7; 13.0.0 — fixed in 12.10.7, 12.9.8

How to fix

Upgrade to a fixed version: GitLab 12.10.7, 12.9.8. Check the vendor advisory for mitigations.

References

https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39897.json
https://gitlab.com/gitlab-org/gitlab/-/issues/341017
https://hackerone.com/reports/1330806
https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39897.json
https://gitlab.com/gitlab-org/gitlab/-/issues/341017
https://hackerone.com/reports/1330806

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