CVE-2023-5933 Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS) in GitLab

What is CVE-2023-5933?

CVE-2023-5933 is a medium-severity cross-site scripting vulnerability in Gitlab Gitlab, published on 26 Jan 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 after 13.7 before 16.6.6, 16.7 prior to 16.7.4, and 16.8 prior to 16.8.1. Improper input sanitization of user name allows arbitrary API PUT requests.

Weakness: CWE-79, CWE-80

Which versions are affected by CVE-2023-5933?

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

Products include Gitlab Gitlab.

How do I fix CVE-2023-5933?

Upgrade gitlab to a fixed version for your release line: 16.6.6, 16.7.4 or 16.8.1.

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-2023-5933 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-5933 exists.

Other vulnerabilities in Gitlab Gitlab

• CVE-2026-97229 GitLab Community Edition and Enterprise Edition Integer Overflow or Wraparound Exploited Critical 10.0
• CVE-2026-85706 GitLab Community Edition and Enterprise Edition Path Traversal Exploited Critical 10.0
• CVE-2023-7028 GitLab Community and Enterprise Editions Improper Access Control Exploited Critical 10.0
• CVE-2021-22205 GitLab Community and Enterprise Editions Remote Code Execution Exploited Critical 10.0
• CVE-2021-39935 GitLab Community and Enterprise Editions Server-Side Request Forgery (SSRF) Exploited Medium 6.8

All Gitlab Gitlab vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as BIT-gitlab-2023-5933, GHSA-84m5-rqxq-483p, UBUNTU-CVE-2023-5933.