CVE-2025-8405
High
Description
GitLab has remediated a security issue in GitLab CE/EE affecting all versions from 17.1 before 18.4.6, 18.5 before 18.5.4, and 18.6 before 18.6.2 that could have allowed an authenticated user to perform unauthorized actions on behalf of other users by injecting malicious HTML into vulnerability code flow displays.
SeverityHigh
CVSS7.7
Exploit probability—
Product
Gitlab
PublishedDec 11, 2025
First seenDec 11, 2025
Weakness typeCWE-116CWE-116
How to fix
Update
- gitlab gitlab18.4.6, 18.5.4, 18.6.2 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| gitlab gitlab | 17.1.0 ≤ v < 18.4.6, 18.5.0 ≤ v < 18.5.4, 18.6.0 ≤ v < 18.6.2 | 18.4.6, 18.5.4, 18.6.2 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.