CVE-2026-52854

The MediaWiki Maps extension (versions before 12.1.3) is vulnerable to stored XSS: the display_map parser function's overlays parameter passes unescaped overlay names to Leaflet's layer-control label code, enabling script execution in any viewer's browser. A PoC exists using {{#display_map:0,0|se...

CVE-2026-52854 mediawiki/maps: Stored XSS through the overlays parameter in the display_map parser function

Maps is a MediaWiki extension that enables visualization of geographic data through dynamic embedded maps. Prior to version 12.1.3, the displaymap parser function in the Leaflet service accepts attacker-controlled HTML in the overlays parameter, and resources/leaflet/jquery.leaflet.js uses the...