CVE-2026-52854mediawiki/maps: Stored XSS through the overlays parameter in the display_map parser function
Updated under an hour ago ()
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It affects ProfessionalWiki Maps. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 8.6 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L
- Weakness (CWE)
- CWE-79, CWE-80
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- GitHub_M
- NVD analysis
- Deferred
- Record last updated
- Aug 19, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
ProfessionalWiki Maps professionalwiki:maps (from the name) | before 12.1.3 | CNA record |
References
- https://github.com/ProfessionalWiki/Maps/security/advisories/GHSA-4h7g-5542-v3fcx-refsource-confirm
- https://github.com/ProfessionalWiki/Maps/pull/899x-refsource-misc
- https://github.com/ProfessionalWiki/Maps/commit/737a993fc2f40499e9bb22198fd1d56c25613806x-refsource-misc
- https://github.com/ProfessionalWiki/Maps/blob/12.1.3/RELEASE-NOTES.mdx-refsource-misc
- https://github.com/ProfessionalWiki/Maps/releases/tag/12.1.3x-refsource-misc
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.