CVE-2021-39881

Name: CVE-2021-39881
Creator: NVD / NIST
Published: 2021-10-05T14:15:07.883+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

LOWCVSS 3.5/10EPSS 0.85%

Last modified Jun 17, 2026

CVE-2021-39881 is a low-severity vulnerability rated 3.5/10 on the CVSS scale. In all versions of GitLab CE/EE since version 7.7, the application may let a malicious user create an OAuth client application with arbitrary scope names which may allow the malicious user to trick unsuspecting users to authorize the malicious client application using the spoofed scope name and description.. EPSS estimates a 0.85% chance of exploitation in the next 30 days.

Description

In all versions of GitLab CE/EE since version 7.7, the application may let a malicious user create an OAuth client application with arbitrary scope names which may allow the malicious user to trick unsuspecting users to authorize the malicious client application using the spoofed scope name and description.

Metrics

CVSS 3.1

3.5/10

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

EPSS Probability

0.85%

53.4th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Gitlab	Gitlab	>= 7.7.0, < 14.1.7
Gitlab	Gitlab	>= 14.2.0, < 14.2.5
Gitlab	Gitlab	>= 14.3.0, < 14.3.1

References

https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39881.jsonVendor Advisory
https://gitlab.com/gitlab-org/gitlab/-/issues/26695Broken Link
https://hackerone.com/reports/494530Permissions Required, Third Party Advisory
https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39881.jsonVendor Advisory
https://gitlab.com/gitlab-org/gitlab/-/issues/26695Broken Link
https://hackerone.com/reports/494530Permissions Required, Third Party Advisory

Timeline

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

Frequently Asked Questions

What is CVE-2021-39881?

How severe is CVE-2021-39881?

CVE-2021-39881 has a CVSS score of 3.5/10 (LOW severity). The EPSS model estimates a 0.85% probability of exploitation in the next 30 days.

How do I fix CVE-2021-39881?

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-2021-39881?

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

Scan your code now

Source: NVD / NIST