CVE-2019-5468

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.1% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2020-01-28 · updated 2026-06-17
Weakness: CWE-269

Description

An privilege escalation issue was discovered in Gitlab versions < 12.1.2, < 12.0.4, and < 11.11.6 when Mattermost slash commands are used with a blocked account.

Affected products

GitLab: from 11.11.0 before 11.11.6; from 12.0.0 before 12.0.4; from 12.1.0 before 12.1.2 — fixed in 11.11.6, 12.0.4, 12.1.2

How to fix

Upgrade to a fixed version: GitLab 11.11.6, 12.0.4, 12.1.2. Check the vendor advisory for mitigations.

References

https://about.gitlab.com/releases/2019/07/29/security-release-gitlab-12-dot-1-dot-2-released/
https://gitlab.com/gitlab-org/gitlab-ce/issues/57556
https://hackerone.com/reports/493562
https://about.gitlab.com/releases/2019/07/29/security-release-gitlab-12-dot-1-dot-2-released/
https://gitlab.com/gitlab-org/gitlab-ce/issues/57556
https://hackerone.com/reports/493562

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