CVE-2019-5471

Severity: medium (CVSS 5.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.8% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2019-09-09 · updated 2026-06-17
Weakness: CWE-79

Description

An input validation and output encoding issue was discovered in the GitLab email notification feature which could result in a persistent XSS. This was addressed in GitLab 12.1.2, 12.0.4, and 11.11.6.

Affected products

GitLab: from 11.11.0 before 11.11.7; from 12.0.0 before 12.0.4; from 12.1.0 before 12.1.2 — fixed in 11.11.7, 12.0.4, 12.1.2

How to fix

Upgrade to a fixed version: GitLab 11.11.7, 12.0.4, 12.1.2. Check the vendor advisory for mitigations.

References

https://gitlab.com/gitlab-org/gitlab-ee/issues/11515
https://hackerone.com/reports/496973
https://about.gitlab.com/2019/07/29/security-release-gitlab-12-dot-1-dot-2-released/
https://gitlab.com/gitlab-org/gitlab-ee/issues/11515
https://hackerone.com/reports/496973

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