CVE-2021-39888

Name: CVE-2021-39888
Creator: NVD / NIST
Published: 2021-10-05T13:15:08.367+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.3/10EPSS 1.01%

Last modified Jun 17, 2026

CVE-2021-39888 is a medium-severity vulnerability rated 4.3/10 on the CVSS scale. 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.. EPSS estimates a 1.01% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

4.3/10

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

EPSS Probability

1.01%

58.6th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Gitlab	Gitlab	>= 13.10.0, < 14.1.7
Gitlab	Gitlab	>= 14.2.0, < 14.2.5
Gitlab	Gitlab	14.3.0

References

https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39888.jsonVendor Advisory
https://gitlab.com/gitlab-org/gitlab/-/issues/336446Broken Link, Exploit, Issue Tracking, Vendor Advisory
https://hackerone.com/reports/1255128Permissions Required
https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39888.jsonVendor Advisory
https://gitlab.com/gitlab-org/gitlab/-/issues/336446Broken Link, Exploit, Issue Tracking, Vendor Advisory
https://hackerone.com/reports/1255128Permissions Required

Timeline

Published: Oct 5, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-39888?

How severe is CVE-2021-39888?

CVE-2021-39888 has a CVSS score of 4.3/10 (MEDIUM severity). The EPSS model estimates a 1.01% probability of exploitation in the next 30 days.

How do I fix CVE-2021-39888?

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-2021-39888?

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

Scan your code now

Source: NVD / NIST