CVE-2025-11990: Critical Vulnerability in GitLab

GitLab recently addressed a severe security issue labeled CVE-2025-11990. This vulnerability can affect GitLab EE versions 18.4 prior to 18.4.4 and 18.5 before 18.5.2. An authenticated user could exploit this weakness to gain Cross-Site Request Forgery (CSRF) tokens due to improper input validation in repository references.

Why This Vulnerability Matters

This vulnerability poses a significant threat to server security, particularly for system administrators and hosting providers. Exploiting this flaw could allow unauthorized actions across servers and web applications. For any business relying on GitLab for project management and version control, this vulnerability could result in data breaches and loss of sensitive information.

Mitigation Steps

To safeguard server infrastructure against this vulnerability, consider the following steps:

• Immediately update GitLab EE to at least version 18.4.4 or 18.5.2 to patch this vulnerability.
• Review and enhance input validation methods, particularly for repository references.
• Reassess your redirect handling logic to ensure it does not expose weaknesses.

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