CVE-2025-12734 — Improper Encoding or Escaping of Output in Gitlab

CWE-116 — Improper Encoding or Escaping of Output6 documents6 sources
Severity
3.5LOWNVD
EPSS
0.0%
top 94.07%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
3
GitlabDebian GitlabGitlab CE
Timeline
PublishedDec 11

Description

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 vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:NExploitability: 2.1 | Impact: 1.4

Affected Packages5 packages

▶CVEListV5gitlab/gitlab15.6 — 18.4.6+2
▶NVDgitlab/gitlab15.6.0 — 18.4.6+2
▶debiandebian/gitlab
▶gitlabgitlab/gitlab

🔴Vulnerability Details

2
OSV
CVE-2025-12734: GitLab has remediated an issue in GitLab CE/EE affecting all versions from 15↗2025-12-11
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GHSA
GHSA-cpx5-2q84-prc5: GitLab has remediated an issue in GitLab CE/EE affecting all versions from 15↗2025-12-11
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📋Vendor Advisories

2
GitLab
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 h↗2025-12-11
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Debian
CVE-2025-12734: gitlab - GitLab has remediated an issue in GitLab CE/EE affecting all versions from 15.6 ...↗2025
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🕵️Threat Intelligence

1
Wiz
CVE-2025-12734 Impact, Exploitability, and Mitigation Steps | Wiz↗
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