What’s Vulnerable › Vulnerabilities
CVE-2025-4439: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in GitLab
- Severity: medium (CVSS 5.4 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.3% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2025-07-23 · updated 2026-06-17
- Weakness: CWE-79
Description
An issue has been discovered in GitLab CE/EE affecting all versions from 15.10 before 18.0.5, 18.1 before 18.1.3, and 18.2 before 18.2.1 that could have allowed an authenticated user to perform cross-site scripting attacks when the instance is served through certain content delivery networks.
Affected products
- GitLab: from 15.10.0 before 18.0.5; from 18.1.0 before 18.1.3; 18.2 — fixed in 18.0.5, 18.1.3
How to fix
Upgrade to a fixed version: GitLab 18.0.5, 18.1.3. Check the vendor advisory for mitigations.
References
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