CVE-2021-39908

Name: CVE-2021-39908
Creator: NVD / NIST
Published: 2022-04-01T23:15:10.407+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 1.22%

Last modified Jun 17, 2026

CVE-2021-39908 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. In all versions of GitLab CE/EE starting from 0.8.0 before 14.2.6, all versions starting from 14.3 before 14.3.4, and all versions starting from 14.4 before 14.4.1 certain Unicode characters can be abused to commit malicious code into projects without being noticed in merge request or source code viewer UI.. EPSS estimates a 1.22% chance of exploitation in the next 30 days.

Description

In all versions of GitLab CE/EE starting from 0.8.0 before 14.2.6, all versions starting from 14.3 before 14.3.4, and all versions starting from 14.4 before 14.4.1 certain Unicode characters can be abused to commit malicious code into projects without being noticed in merge request or source code viewer UI.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

1.22%

64.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-94

Affected Software

Vendor	Product	Versions
Gitlab	Gitlab	>= 0.8.0, < 14.2.6
Gitlab	Gitlab	>= 14.3.0, < 14.3.4
Gitlab	Gitlab	14.4.0

References

https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39908.jsonVendor Advisory
https://gitlab.com/gitlab-org/gitlab/-/issues/337193Broken Link
https://hackerone.com/reports/1280077Permissions Required, Third Party Advisory
https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39908.jsonVendor Advisory
https://gitlab.com/gitlab-org/gitlab/-/issues/337193Broken Link
https://hackerone.com/reports/1280077Permissions Required, Third Party Advisory

Timeline

Published: Apr 1, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-39908?

How severe is CVE-2021-39908?

CVE-2021-39908 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.22% probability of exploitation in the next 30 days.

How do I fix CVE-2021-39908?

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-2021-39908?

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

Scan your code now

Source: NVD / NIST