CVE-2025-1540: Incorrect Authorization in GitLab

Severity: medium (CVSS 4.2 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2025-03-06 · updated 2026-06-17
Weakness: CWE-863

Description

An issue has been discovered in GitLab CE/EE for Self-Managed and Dedicated instances affecting all versions from 17.5 prior to 17.6.5, 17.7 prior to 17.7.4, and 17.8 prior to 17.8.2. It was possible for a user added as an External to read and clone internal projects under certain circumstances."

Affected products

GitLab: from 17.5.0 before 17.6.5; from 17.7.0 before 17.7.4; from 17.8.0 before 17.8.2 — fixed in 17.6.5, 17.7.4, 17.8.2

How to fix

Upgrade to a fixed version: GitLab 17.6.5, 17.7.4, 17.8.2. Check the vendor advisory for mitigations.

References

https://about.gitlab.com/releases/2025/02/12/patch-release-gitlab-17-8-2-released/#saml-authentication-misconfigures-external-user-attribute
https://gitlab.com/gitlab-org/gitlab/-/issues/512765

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