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.
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)
|
History
23 Dec 2025, 21:02
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://about.gitlab.com/releases/2025/12/10/patch-release-gitlab-18-6-2-released/ - Release Notes, Vendor Advisory | |
| References | () https://gitlab.com/gitlab-org/gitlab/-/issues/579573 - Broken Link | |
| References | () https://hackerone.com/reports/3379381 - Permissions Required | |
| First Time |
Gitlab
Gitlab gitlab |
|
| CPE | cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:* cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:* |
17 Dec 2025, 00:15
| Type | Values Removed | Values Added |
|---|---|---|
| Summary | (en) 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. |
11 Dec 2025, 08:15
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2025-12-11 08:15
Updated : 2025-12-23 21:02
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