CVE-2018-19573

Severity: medium (CVSS 5.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.0% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2019-07-10 · updated 2026-06-17
Weakness: CWE-79

Description

GitLab CE/EE, versions 10.3 up to 11.x before 11.3.11, 11.4 before 11.4.8, and 11.5 before 11.5.1, are vulnerable to an XSS vulnerability in Markdown fields via Mermaid.

Affected products

GitLab: from 11.0.0 before 11.3.11; from 11.4.0 before 11.4.8; from 11.5.0 before 11.5.1 — fixed in 11.3.11, 11.4.8, 11.5.1

How to fix

Upgrade to a fixed version: GitLab 11.3.11, 11.4.8, 11.5.1. Check the vendor advisory for mitigations.

References

http://www.securityfocus.com/bid/109164
https://about.gitlab.com/2018/11/28/security-release-gitlab-11-dot-5-dot-1-released/
https://gitlab.com/gitlab-org/gitlab-ce/issues/45906
http://www.securityfocus.com/bid/109164
https://about.gitlab.com/2018/11/28/security-release-gitlab-11-dot-5-dot-1-released/
https://gitlab.com/gitlab-org/gitlab-ce/issues/45906

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