CVE-2025-12983

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.

CVSS v3 3.5 LOW

3.5^/10

CVSS v3 : LOW

Vector :

Exploitability : 1.8 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact LOW

Scope CHANGED

References

Link	Resource
https://about.gitlab.com/releases/2025/11/12/patch-release-gitlab-18-5-2-released/	Release Notes Vendor Advisory
https://gitlab.com/gitlab-org/gitlab/-/issues/296257	Broken Link
https://hackerone.com/reports/3419588	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

19 Nov 2025, 19:44

Type	Values Removed	Values Added
First Time		Gitlab gitlab Gitlab
CPE		cpe:2.3:a:gitlab:gitlab:::::community:::* cpe:2.3:a:gitlab:gitlab:::::enterprise:::*
References	~~() https://about.gitlab.com/releases/2025/11/12/patch-release-gitlab-18-5-2-released/ -~~	() https://about.gitlab.com/releases/2025/11/12/patch-release-gitlab-18-5-2-released/ - Release Notes, Vendor Advisory
References	~~() https://gitlab.com/gitlab-org/gitlab/-/issues/296257 -~~	() https://gitlab.com/gitlab-org/gitlab/-/issues/296257 - Broken Link
References	~~() https://hackerone.com/reports/3419588 -~~	() https://hackerone.com/reports/3419588 - Permissions Required

15 Nov 2025, 09:15

Type	Values Removed	Values Added
New CVE

Information

Published : 2025-11-15 09:15

Updated : 2025-11-19 19:44

NVD link : CVE-2025-12983

Mitre link : CVE-2025-12983

CVE.ORG link : CVE-2025-12983

JSON object : View

Products Affected

gitlab

gitlab

CWE

CWE-789

Memory Allocation with Excessive Size Value

{"id": "CVE-2025-12983", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "[email protected]", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 3.5, "attackVector": "NETWORK", "baseSeverity": "LOW", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:L", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "LOW", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 1.4, "exploitabilityScore": 1.8}, {"type": "Primary", "source": "[email protected]", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 6.5, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 2.8}]}, "published": "2025-11-15T09:15:41.950", "references": [{"url": "https://about.gitlab.com/releases/2025/11/12/patch-release-gitlab-18-5-2-released/", "tags": ["Release Notes", "Vendor Advisory"], "source": "[email protected]"}, {"url": "https://gitlab.com/gitlab-org/gitlab/-/issues/296257", "tags": ["Broken Link"], "source": "[email protected]"}, {"url": "https://hackerone.com/reports/3419588", "tags": ["Permissions Required"], "source": "[email protected]"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "[email protected]", "description": [{"lang": "en", "value": "CWE-789"}]}], "descriptions": [{"lang": "en", "value": "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."}], "lastModified": "2025-11-19T19:44:25.580", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*", "vulnerable": true, "matchCriteriaId": "B097C4A0-D3E7-4EE7-8533-30CE2CC51381", "versionEndExcluding": "18.3.6", "versionStartIncluding": "16.9.0"}, {"criteria": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*", "vulnerable": true, "matchCriteriaId": "3073B463-3C6C-456E-8EC6-6E1CA4B3489C", "versionEndExcluding": "18.3.6", "versionStartIncluding": "16.9.0"}, {"criteria": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*", "vulnerable": true, "matchCriteriaId": "36824F52-C9A0-4FB3-91F3-05593E3551E8", "versionEndExcluding": "18.4.4", "versionStartIncluding": "18.4.0"}, {"criteria": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*", "vulnerable": true, "matchCriteriaId": "6D0A238D-1278-4D05-86F5-4C323E0CFE36", "versionEndExcluding": "18.4.4", "versionStartIncluding": "18.4.0"}, {"criteria": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*", "vulnerable": true, "matchCriteriaId": "7E85D20B-EEE1-4CC9-B50A-4040972287D8", "versionEndExcluding": "18.5.2", "versionStartIncluding": "18.5.0"}, {"criteria": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*", "vulnerable": true, "matchCriteriaId": "B2A3A57F-C750-4C92-8C2B-C5FCF1D70F4F", "versionEndExcluding": "18.5.2", "versionStartIncluding": "18.5.0"}], "operator": "OR"}]}], "sourceIdentifier": "[email protected]"}