CVE-2025-12734

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 15.6 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, under certain conditions, render content in dialogs to other users by injecting malicious HTML content into merge request titles.

CVSS v3 3.5 LOW

3.5^/10

CVSS v3 : LOW

Vector :

Exploitability : 2.1 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction REQUIRED

Confidentiality Impact NONE

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://about.gitlab.com/releases/2025/12/10/patch-release-gitlab-18-6-2-released/	Release Notes Vendor Advisory
https://gitlab.com/gitlab-org/gitlab/-/issues/579573	Broken Link
https://hackerone.com/reports/3379381	Permissions Required

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:gitlab:gitlab:::::community:::*
	cpe:2.3:a:gitlab:gitlab:::::enterprise:::*
	cpe:2.3:a:gitlab:gitlab:::::community:::*
	cpe:2.3:a:gitlab:gitlab:::::enterprise:::*
	cpe:2.3:a:gitlab:gitlab:::::community:::*
	cpe:2.3:a:gitlab:gitlab:::::enterprise:::*

History

14 Oct 2026, 21:10

Type	Values Removed	Values Added
Summary		(es) GitLab ha subsanado un problema en GitLab CE/EE que afectaba a todas las versiones desde la 15.6 hasta las anteriores a la 18.4.6, desde la 18.5 hasta las anteriores a la 18.5.4, y desde la 18.6 hasta las anteriores a la 18.6.2 que podría haber permitido a un usuario autenticado, bajo ciertas condiciones, renderizar contenido en diálogos a otros usuarios inyectando contenido HTML malicioso en los títulos de las solicitudes de fusión.

Information

Published : 2025-12-11 08:15

Updated : 2026-10-14 21:10

NVD link : CVE-2025-12734

Mitre link : CVE-2025-12734

CVE.ORG link : CVE-2025-12734

JSON object : View

Products Affected

gitlab

gitlab

CWE

CWE-116

Improper Encoding or Escaping of Output

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