CVE-2021-22251

Severity: medium (CVSS 4.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.8% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2021-08-23 · updated 2026-06-17
Weakness: CWE-863

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

Affected products

GitLab: from 12.2.0 before 13.12.9; from 14.0.0 before 14.0.7; from 14.1.0 before 14.1.2 — fixed in 13.12.9, 14.0.7, 14.1.2

How to fix

Upgrade to a fixed version: GitLab 13.12.9, 14.0.7, 14.1.2. Check the vendor advisory for mitigations.

References

https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-22251.json
https://gitlab.com/gitlab-org/gitlab/-/issues/14004
https://hackerone.com/reports/679567
https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-22251.json
https://gitlab.com/gitlab-org/gitlab/-/issues/14004
https://hackerone.com/reports/679567

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