CVE-2018-20500

Severity: high (CVSS 7.5 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2019-05-17 · updated 2026-06-17
Weakness: CWE-732

Description

An insecure permissions issue was discovered in GitLab Community and Enterprise Edition 9.4 and later but before 11.4.13, 11.5.x before 11.5.6, and 11.6.x before 11.6.1. The runner registration token in the CI/CD settings could not be reset. This was a security risk if one of the maintainers leaves the group and they know the token.

Affected products

GitLab: from 9.4.0 before 11.4.13; from 11.5.0 before 11.5.6; from 11.6.0 before 11.6.1 — fixed in 11.4.13, 11.5.6, 11.6.1

How to fix

Upgrade to a fixed version: GitLab 11.4.13, 11.5.6, 11.6.1. Check the vendor advisory for mitigations.

References

https://about.gitlab.com/2018/12/31/security-release-gitlab-11-dot-6-dot-1-released/
https://about.gitlab.com/blog/categories/releases/
https://about.gitlab.com/2018/12/31/security-release-gitlab-11-dot-6-dot-1-released/
https://about.gitlab.com/blog/categories/releases/

Get alerted when CVE-2018-20500 or the next vulnerability affects your stack