CVE-2025-4278 Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS) in GitLab
HTML injection in GitLab's new search page allows attackers to execute 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-2025-4278?
CVE-2025-4278 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 starting with 18.0 before 18.0.2. Under certain conditions html injection in new search page could lead to account takeover.
Weakness: CWE-80
Which versions are affected by CVE-2025-4278?
1 open source package ship an affected version, including gitlab. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
gitlab Bitnami | From 18.0.0 | 18.0.2 |
Products include Gitlab Gitlab.
How do I fix CVE-2025-4278?
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-2025-4278 being exploited?
There is no known exploitation of CVE-2025-4278 in the wild and no public exploit code.
Other vulnerabilities in Gitlab Gitlab
- CVE-2026-97229 GitLab Community Edition and Enterprise Edition Integer Overflow or Wraparound
- CVE-2026-85706 GitLab Community Edition and Enterprise Edition Path Traversal
- CVE-2023-7028 GitLab Community and Enterprise Editions Improper Access Control
- CVE-2021-22205 GitLab Community and Enterprise Editions Remote Code Execution
- CVE-2021-39935 GitLab Community and Enterprise Editions Server-Side Request Forgery (SSRF)
Sources
Also known as BIT-gitlab-2025-4278, GHSA-wjcq-cqhf-f7rm, UBUNTU-CVE-2025-4278.