CVE-2023-0523 Cross-site scripting in GitLab

Medium 5.4 Published 5 Apr 2023 Updated 10 Feb 2025

An attacker can execute arbitrary scripts in victim browsers via a malicious email address, 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-2023-0523?

CVE-2023-0523 is a medium-severity cross-site scripting vulnerability in Gitlab Gitlab, published on 5 Apr 2023. 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 affecting all versions starting from 15.6 before 15.8.5, 15.9 before 15.9.4, and 15.10 before 15.10.1. An XSS was possible via a malicious email address for certain instances.

Weakness: CWE-79

Which versions are affected by CVE-2023-0523?

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

Package	Affected	Fixed in
`gitlab` Bitnami	From `15.6.0`	`15.8.5, 15.9.4, 15.10.1`

Products include Gitlab Gitlab.

How do I fix CVE-2023-0523?

Upgrade gitlab to a fixed version for your release line: 15.8.5, 15.9.4 or 15.10.1.

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-2023-0523 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-0523 exists.

All Gitlab Gitlab vulnerabilities

Sources

Also known as BIT-gitlab-2023-0523, GHSA-qgpv-xwh3-9v79, UBUNTU-CVE-2023-0523.