Maps is a MediaWiki extension that enables visualization of geographic data through dynamic embedded maps. Prior to version 12.1.3, the display_map parser function in the Leaflet service accepts attacker-controlled HTML in the overlays parameter, and resources/leaflet/jquery.leaflet.js uses the overlay name as a Leaflet layer-control label without escaping it. A wiki user with the edit permission can store malicious wikitext that causes script execution when another user previews or views the affected map. The script executes in the viewing user's browser session and can access data or perform actions available to that user. This issue is fixed in version 12.1.3.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact Low

Availability Impact Low

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
ProfessionalWiki Maps affected
Version Status Constraints
< 12.1.3 affected —

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Project Subscriptions

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-4h7g-5542-v3fc mediawiki/maps has stored XSS through the overlays parameter in the display_map parser function
Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/ProfessionalWiki/Maps/blob/12.1.3/RELEASE-NOTES.md cve-icon cve-icon
https://github.com/ProfessionalWiki/Maps/commit/737a993fc2f40499e9bb22198fd1d56c25613806 cve-icon cve-icon
https://github.com/ProfessionalWiki/Maps/pull/899 cve-icon cve-icon
https://github.com/ProfessionalWiki/Maps/releases/tag/12.1.3 cve-icon cve-icon
https://github.com/ProfessionalWiki/Maps/security/advisories/GHSA-4h7g-5542-v3fc cve-icon cve-icon
History

Tue, 18 Aug 2026 21:45:00 +0000

Type Values Removed Values Added
Description Maps is a MediaWiki extension that enables visualization of geographic data through dynamic embedded maps. Prior to version 12.1.3, the display_map parser function in the Leaflet service accepts attacker-controlled HTML in the overlays parameter, and resources/leaflet/jquery.leaflet.js uses the overlay name as a Leaflet layer-control label without escaping it. A wiki user with the edit permission can store malicious wikitext that causes script execution when another user previews or views the affected map. The script executes in the viewing user's browser session and can access data or perform actions available to that user. This issue is fixed in version 12.1.3.
Title mediawiki/maps: Stored XSS through the overlays parameter in the display_map parser function
Weaknesses CWE-79
CWE-80
References
Metrics cvssV3_1

{'score': 8.6, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-08-18T21:32:09.253Z

Reserved: 2026-06-08T18:41:27.724Z

Link: CVE-2026-52854

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-08-18T22:16:53.470

Modified: 2026-08-18T22:16:53.470

Link: CVE-2026-52854

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-18T22:30:04Z

Weaknesses