CVE-2021-22225

Severity: medium (CVSS 5.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-07-07 · updated 2026-06-17
Weakness: CWE-79

Description

Insufficient input sanitization in markdown in GitLab version 13.11 and up allows an attacker to exploit a stored cross-site scripting vulnerability via a specially-crafted markdown

Affected products

GitLab: from 13.11.3 before 13.11.6; from 13.12.0 before 13.12.6; from 14.0.0 before 14.0.2 — fixed in 13.11.6, 13.12.6, 14.0.2

How to fix

Upgrade to a fixed version: GitLab 13.11.6, 13.12.6, 14.0.2. Check the vendor advisory for mitigations.

References

https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-22225.json
https://gitlab.com/gitlab-org/gitlab/-/issues/331051
https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-22225.json
https://gitlab.com/gitlab-org/gitlab/-/issues/331051

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