CVE-2018-17455

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-04-15 · updated 2026-06-17
Weakness: CWE-639

Description

An issue was discovered in GitLab Enterprise Edition before 11.1.7, 11.2.x before 11.2.4, and 11.3.x before 11.3.1. Attackers could obtain sensitive information about group names, avatars, LDAP settings, and descriptions via an insecure direct object reference to the "merge request approvals" feature.

Affected products

GitLab: before 11.1.7; from 11.2.0 before 11.2.4; 11.3.0 — fixed in 11.1.7, 11.2.4

How to fix

Upgrade to a fixed version: GitLab 11.1.7, 11.2.4. Check the vendor advisory for mitigations.

References

https://about.gitlab.com/blog/categories/releases/
https://about.gitlab.com/releases/2018/10/01/security-release-gitlab-11-dot-3-dot-1-released/
https://about.gitlab.com/blog/categories/releases/
https://about.gitlab.com/releases/2018/10/01/security-release-gitlab-11-dot-3-dot-1-released/

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