CVE-2025-4979: Insufficient Granularity of Access Control in GitLab
An issue has been discovered in GitLab CE/EE affecting all versions before 17.10.7, 17.11 before 17.11.3, and 18.0 before 18.0.1. An attacker may be able to reveal masked or hidden CI variables (that they did not author) in the WebUI, by simply creating their own variable and observing the HTTP response.
Affected Software
Remediation
Information
Event History
Peer vulnerabilities
Found alongside the following vulnerabilities.
Frequently Asked Questions
What is the severity of CVE-2025-4979?
CVE-2025-4979 has a severity rating that indicates a significant risk of exposure due to the potential disclosure of sensitive CI variables.
How do I fix CVE-2025-4979?
To fix CVE-2025-4979, upgrade to GitLab CE/EE version 17.10.7, 17.11.3 or later, or 18.0.1 or later.
Which versions of GitLab are affected by CVE-2025-4979?
CVE-2025-4979 affects all versions of GitLab CE/EE prior to 17.10.7, 17.11 before 17.11.3, and 18.0 before 18.0.1.
What type of vulnerability is CVE-2025-4979?
CVE-2025-4979 is a vulnerability that allows unauthorized disclosure of masked or hidden CI variables in GitLab.
Can I mitigate CVE-2025-4979 without upgrading?
Mitigation strategies for CVE-2025-4979 are limited, and the recommended action is to upgrade to a patched version.