CVE-2025-2255: gitlab XSS — Exploit

Description

An issue has been discovered in Gitlab EE/CE for AppSec affecting all versions from 13.5.0 before 17.8.6, 17.9 before 17.9.3, and 17.10 before 17.10.1. Certain error messages could allow Cross-Site Scripting attacks (XSS). for AppSec.

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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	13.5.0 — 17.8.6
gitlab	gitlab	13.5.0 — 17.8.6
gitlab	gitlab	17.9.0 — 17.9.3
gitlab	gitlab	17.9.0 — 17.9.3
gitlab	gitlab	All
gitlab	gitlab	All

References

Exploits

https://gitlab.com/gitlab-org/gitlab/-/issues/524635

Other References

https://hackerone.com/reports/2994150

Frequently Asked Questions

What is CVE-2025-2255? +

An issue has been discovered in Gitlab EE/CE for AppSec affecting all versions from 13.5.0 before 17.8.6, 17.9 before 17.9.3, and 17.10 before 17.10.1. Certain error messages could allow Cross-Site Scripting attacks (XSS). for AppSec. It has a CVSS v3.1 base score of 8.7 (HIGH).

How severe is CVE-2025-2255? +

CVE-2025-2255 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-2025-2255? +

CVE-2025-2255 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-2025-2255? +

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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