CVE-2021-22196

Severity: medium (CVSS 5.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.9% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-04-02 · updated 2026-06-17
Weakness: CWE-79

Description

An issue has been discovered in GitLab CE/EE affecting all versions starting from 13.4. It was possible to exploit a stored cross-site-scripting in merge request via a specifically crafted branch name.

Affected products

GitLab: from 13.4.0 before 13.8.7; from 13.9.0 before 13.9.5; from 13.10.0 before 13.10.1 — fixed in 13.10.1, 13.8.7, 13.9.5

How to fix

Upgrade to a fixed version: GitLab 13.10.1, 13.8.7, 13.9.5. Check the vendor advisory for mitigations.

References

https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-22196.json
https://gitlab.com/gitlab-org/gitlab/-/issues/254710
https://hackerone.com/reports/977697
https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-22196.json
https://gitlab.com/gitlab-org/gitlab/-/issues/254710
https://hackerone.com/reports/977697

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