CVE-2025-4278

Public Exploit
Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS) in GitLab

Description

An issue has been discovered in GitLab CE/EE affecting all versions starting with 18.0 before 18.0.2. Under certain conditions html injection in new search page could lead to account takeover.

Remediation

Solution:

  • Upgrade to versions 18.0.2 or above.

Category

8.7
CVSS
Severity: High
CVSS 3.1 •
EPSS 0.02%
Affected: GitLab GitLab
Published at:
Updated at:

References

Link Tags
https://gitlab.com/gitlab-org/gitlab/-/issues/539198 issue tracking permissions required
https://hackerone.com/reports/3085738 technical description exploit permissions required

Frequently Asked Questions

What is the severity of CVE-2025-4278?
CVE-2025-4278 has been scored as a high severity vulnerability.
How to fix CVE-2025-4278?
To fix CVE-2025-4278: Upgrade to versions 18.0.2 or above.
Is CVE-2025-4278 being actively exploited in the wild?
It is possible that CVE-2025-4278 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-4278?
CVE-2025-4278 affects GitLab GitLab.
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