CVE-2025-2254 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in GitLab

High 8.7 Published 12 Jun 2025 Updated 12 Jun 2025

Cross-site scripting in GitLab snippet viewer allows attackers to execute malicious scripts, potentially leading to account takeover.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: Available

What is CVE-2025-2254?

CVE-2025-2254 is a high-severity cross-site scripting vulnerability in Gitlab Gitlab, published on 12 Jun 2025. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

Official description

An issue has been discovered in GitLab CE/EE affecting all versions from 17.9 before 17.10.8, 17.11 before 17.11.4, and 18.0 before 18.0.2. Improper output encoding in the snipper viewer functionality lead to Cross-Site scripting attacks.

Weakness: CWE-79

Which versions are affected by CVE-2025-2254?

1 open source package ship an affected version, including gitlab. It affects 1 product.

Package	Affected	Fixed in
`gitlab` Bitnami	From `17.9.0`	`18.0.2`

Products include Gitlab Gitlab.

How do I fix CVE-2025-2254?

Upgrade gitlab to 18.0.2 or later.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2025-2254 being exploited?

There is no known exploitation of CVE-2025-2254 in the wild and no public exploit code.

All Gitlab Gitlab vulnerabilities

Sources

Also known as BIT-gitlab-2025-2254, GHSA-27jm-6pj2-8w7g, UBUNTU-CVE-2025-2254.