CVE-2021-39941

Name: CVE-2021-39941
Creator: NVD / NIST
Published: 2021-12-13T16:15:09.72+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.3/10EPSS 1.18%

Last modified Jun 17, 2026

CVE-2021-39941 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. An information disclosure vulnerability in GitLab CE/EE versions 12.0 to 14.3.6, 14.4 to 14.4.4, and 14.5 to 14.5.2 allowed non-project members to see the default branch name for projects that restrict access to the repository to project members. EPSS estimates a 1.18% chance of exploitation in the next 30 days.

Description

An information disclosure vulnerability in GitLab CE/EE versions 12.0 to 14.3.6, 14.4 to 14.4.4, and 14.5 to 14.5.2 allowed non-project members to see the default branch name for projects that restrict access to the repository to project members

Metrics

CVSS 3.1

5.3/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

EPSS Probability

1.18%

63.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-200

Affected Software

Vendor	Product	Versions
Gitlab	Gitlab	>= 12.0.0, < 14.3.6
Gitlab	Gitlab	>= 14.4.0, < 14.4.4
Gitlab	Gitlab	>= 14.5.0, < 14.5.2

References

https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39941.jsonThird Party Advisory
https://gitlab.com/gitlab-org/gitlab/-/issues/33864Broken Link
https://hackerone.com/reports/706361Permissions Required, Third Party Advisory
https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39941.jsonThird Party Advisory
https://gitlab.com/gitlab-org/gitlab/-/issues/33864Broken Link
https://hackerone.com/reports/706361Permissions Required, Third Party Advisory

Timeline

Published: Dec 13, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-39941?

How severe is CVE-2021-39941?

CVE-2021-39941 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 1.18% probability of exploitation in the next 30 days.

How do I fix CVE-2021-39941?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-39941?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST