What is CVE-2025-9642?

CVE-2025-9642 is a high-severity vulnerability in Gitlab, classified under Cross-site Scripting. CVSS score: 8.7/10. Published 2025-09-26.

How severe is CVE-2025-9642?

High severity. CVSS v3 base score is 8.7 out of 10.

Is CVE-2025-9642 known to be exploited?

3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

XSS in Gitlab

CVE-2025-9642

An issue has been discovered in GitLab CE/EE affecting all versions from 14.10 before 18.2.7, 18.3 before 18.3.3, and 18.4 before 18.4.1 that could allow an attacker to inject malicious content that may lead to account takeover.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.005 (40.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.7 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N.

Affected products

Gitlab — versions 18.4.0, 18.3, 18.4

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

References

cve@gitlab.com (issue-tracking, permissions-required, Broken Link)
cve@gitlab.com (Permissions Required, technical-description, permissions-required, exploit)

Frequently asked questions

What is CVE-2025-9642?: CVE-2025-9642 is a high-severity vulnerability in Gitlab, classified under Cross-site Scripting. CVSS score: 8.7/10. Published 2025-09-26.
How severe is CVE-2025-9642?: High severity. CVSS v3 base score is 8.7 out of 10.
Is CVE-2025-9642 known to be exploited?: 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.