CVE-2021-22251

Name: CVE-2021-22251
Creator: NVD / NIST
Published: 2021-08-23T20:15:12.83+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.3/10EPSS 0.82%

Last modified Jun 17, 2026

CVE-2021-22251 is a medium-severity vulnerability rated 4.3/10 on the CVSS scale. Improper validation of invited users' email address in GitLab EE affecting all versions since 12.2 allowed projects to add members with email address domain that should be blocked by group settings. EPSS estimates a 0.82% chance of exploitation in the next 30 days.

Description

Improper validation of invited users' email address in GitLab EE affecting all versions since 12.2 allowed projects to add members with email address domain that should be blocked by group settings

Metrics

CVSS 3.1

4.3/10

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

EPSS Probability

0.82%

52.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-863

Affected Software

Vendor	Product	Versions
Gitlab	Gitlab	>= 12.2.0, < 13.12.9
Gitlab	Gitlab	>= 14.0.0, < 14.0.7
Gitlab	Gitlab	>= 14.1.0, < 14.1.2

References

https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-22251.jsonVendor Advisory
https://gitlab.com/gitlab-org/gitlab/-/issues/14004Exploit, Issue Tracking, Vendor Advisory
https://hackerone.com/reports/679567Permissions Required, Third Party Advisory
https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-22251.jsonVendor Advisory
https://gitlab.com/gitlab-org/gitlab/-/issues/14004Exploit, Issue Tracking, Vendor Advisory
https://hackerone.com/reports/679567Permissions Required, Third Party Advisory

Timeline

Published: Aug 23, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-22251?

Improper validation of invited users' email address in GitLab EE affecting all versions since 12.2 allowed projects to add members with email address domain that should be blocked by group settings

How severe is CVE-2021-22251?

CVE-2021-22251 has a CVSS score of 4.3/10 (MEDIUM severity). The EPSS model estimates a 0.82% probability of exploitation in the next 30 days.

How do I fix CVE-2021-22251?

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-2021-22251?

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

Scan your code now

Source: NVD / NIST