CVE-2023-6371 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in GitLab

High 8.7 Published 28 Mar 2024 Updated 8 May 2026

Attackers can execute arbitrary actions on behalf of victims via stored XSS in GitLab wiki pages.

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-2023-6371?

CVE-2023-6371 is a high-severity cross-site scripting vulnerability in Gitlab Gitlab, published on 28 Mar 2024. 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 before 16.8.5, all versions starting from 16.9 before 16.9.3, all versions starting from 16.10 before 16.10.1. A wiki page with a crafted payload may lead to a Stored XSS, allowing attackers to perform arbitrary actions on behalf of victims.

Weakness: CWE-79

Which versions are affected by CVE-2023-6371?

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

Package	Affected	Fixed in
`gitlab` Bitnami	All versions	`16.8.5, 16.9.3, 16.10.1`

Products include Gitlab Gitlab.

How do I fix CVE-2023-6371?

Upgrade gitlab to a fixed version for your release line: 16.8.5, 16.9.3 or 16.10.1.

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-2023-6371 being exploited?

There is no known exploitation of CVE-2023-6371 in the wild and no public exploit code.

All Gitlab Gitlab vulnerabilities

Sources

Also known as BIT-gitlab-2023-6371, GHSA-h79h-c7qx-243v, UBUNTU-CVE-2023-6371.