Improper Encoding or Escaping of Output in GitLab_CVE-2025-12734

3.5 / 10

LOW

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N

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 leak sensitive information from specifically crafted merge request titles.

Basic Information

ID CVE-2025-12734

Source GitLab

Published Dec 11, 2025 at 07:32

Affected Product

Vendor GitLab

Product GitLab

Version 15.6

Affected Versions GitLab GitLab 15.6
GitLab GitLab 18.5
GitLab GitLab 18.6

CWE Classification

CWE-116

References

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    "lastseen": "",
    "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 leak sensitive information from specifically crafted merge request titles.",
    "published": "2025-12-11T07:32:01.735Z",
    "modified": "2025-12-11T07:32:01.735Z",
    "type": "cve",
    "title": "Improper Encoding or Escaping of Output in GitLab",
    "source": "GitLab",
    "references": "https://gitlab.com/gitlab-org/gitlab/-/issues/579573\nhttps://hackerone.com/reports/3379381\nhttps://about.gitlab.com/releases/2025/12/10/patch-release-gitlab-18-6-2-released/",
    "id": "CVE-2025-12734",
    "bulletinFamily": "",
    "cwe": [
        "CWE-116"
    ],
    "cvelist": null,
    "sourceData": "GitLab GitLab 15.6\nGitLab GitLab 18.5\nGitLab GitLab 18.6",
    "sourceHref": "",
    "cvss": {
        "score": 3.5,
        "severity": "LOW",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
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            "privilegesRequired": "",
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            "confidentialityImpact": "",
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            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "GitLab",
    "version": "15.6",
    "vendor": "GitLab",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
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    "ai_score": 0
}