CVE-2021-22242

5.4 mediumEPSS 64%

Medium (5.4) in gitlab gitlab. EPSS 64% chance of exploitation in the next 30 days.

Insufficient input sanitization in Mermaid markdown in GitLab CE/EE version 11.4 and up allows an attacker to exploit a stored cross-site scripting vulnerability via a specially-crafted markdown

Severity

CVSS 3.1

5.4 medium

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

EPSS: 64% chance of exploitation in the next 30 days; higher than 99% of CVEs (scores of 2026-10-31)
CWE: CWE-79
Published: 2021-08-25
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

gitlab:gitlab

References

https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-22242.json
https://gitlab.com/gitlab-org/gitlab/-/issues/332528
https://hackerone.com/reports/1212822
https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-22242.json
https://gitlab.com/gitlab-org/gitlab/-/issues/332528

Check your stack JSON