CVE-2025-12983
Publication date 15 November 2025
Last updated 19 November 2025
Ubuntu priority
Description
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 16.9 before 18.3.6, 18.4 before 18.4.4, and 18.5 before 18.5.2 that could have allowed an authenticated attacker to cause a denial of service condition by submitting specially crafted markdown content with nested formatting patterns.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| gitlab | 25.10 questing | Not in release |
| 25.04 plucky | Not in release | |
| 24.04 LTS noble | Not in release | |
| 22.04 LTS jammy | Not in release | |
| 16.04 LTS xenial | Ignored |
Notes
mdeslaur
GitLab isn't maintainable as a distro package, and was removed from Ubuntu because of this. We will not be fixing security issues in the gitlab package in Xenial.
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score |
3.5 · Low
|
| Attack vector | Network |
| Attack complexity | High |
| Privileges required | Low |
| User interaction | None |
| Scope | Changed |
| Confidentiality | None |
| Integrity impact | None |
| Availability impact | Low |
| Vector | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:L |