CVE-2025-12983

Severity CVSS v4.0:

Pending analysis

Type:

Unavailable / Other

Publication date:

15/11/2025

Last modified:

15/11/2025

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.

Impact

Vector 3.x

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:L CVSS v3.1 Severity and Metrics:

Base Score: 3.50 LOW
Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:L

Attack Vector (AV): Network
Attack Complexity (AC): High
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Changed
Confidentiality (C): None
Integrity (I): None
Availability (A): Low

Base Score 3.x

3.50

Severity 3.x

LOW

References to Advisories, Solutions, and Tools

https://about.gitlab.com/releases/2025/11/12/patch-release-gitlab-18-5-2-released/
https://gitlab.com/gitlab-org/gitlab/-/issues/296257
https://hackerone.com/reports/3419588