A XSS exists in Gitlab CE/EE < 12.1.10 in the Mermaid plugin.
https://hackerone.com/reports/645043
https://about.gitlab.com/blog/2019/09/30/security-release-gitlab-12-dot-3-dot-2-released/
Source: Mitre, NVD
Published: 2020-01-28
Updated: 2026-06-17
Base Score: 4.3
Vector: CVSS2#AV:N/AC:M/Au:N/C:N/I:P/A:N
Severity: Medium
Base Score: 6.1
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
EPSS: 0.00088