CVE-2025-2443: gitlab XSS (CVSS 8.7)

Description

An issue has been discovered in GitLab EE that allows for cross-site-scripting attack and content security policy bypass in a user's browser under specific conditions, affecting all versions from 16.6 before 17.9.7, 17.10 before 17.10.5, and 17.11 before 17.11.1.

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CVSS v3.1 Score

8.7

HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N

Weakness Type (CWE)

CWE-79 Cross-site Scripting (XSS)

Affected Products

Vendor	Product	Versions
gitlab	gitlab	16.6.0 — 17.9.7
gitlab	gitlab	17.10.0 — 17.10.5
gitlab	gitlab	All

References

Other References

https://gitlab.com/gitlab-org/gitlab/-/issues/525363 https://hackerone.com/reports/3037340

Frequently Asked Questions

What is CVE-2025-2443? +

An issue has been discovered in GitLab EE that allows for cross-site-scripting attack and content security policy bypass in a user's browser under specific conditions, affecting all versions from 16.6 before 17.9.7, 17.10 before 17.10.5, and 17.11 before 17.11.1. It has a CVSS v3.1 base score of 8.7 (HIGH).

How severe is CVE-2025-2443? +

CVE-2025-2443 has a CVSS v3.1 score of 8.7 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2025-2443? +

CVE-2025-2443 affects products from gitlab, specifically: gitlab. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-2443? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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