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...

GHSA-4H7G-5542-V3FC mediawiki/maps has stored XSS through the overlays parameter in the display_map parser function

Summary Stored XSS through wikitext can be performed by inserting malicious HTML into the overlays parameter of the displaymap parser function when using the leaflet service. Details The maps extension doesn't escape overlay names before passing them to leaflet. Leaflet then inserts them as HTML:...

mediawiki/maps has stored XSS through the overlays parameter in the display_map parser function

Summary Stored XSS through wikitext can be performed by inserting malicious HTML into the overlays parameter of the displaymap parser function when using the leaflet service. Details The maps extension doesn't escape overlay names before passing them to leaflet. Leaflet then inserts them as HTML:...

PT-2026-55481

Name of the Vulnerable Software and Affected Versions Maps versions prior to 12.1.3 Description The display map parser function in the Leaflet service fails to properly escape the overlays parameter. This occurs because resources/leaflet/jquery.leaflet.js uses the overlay name as a Leaflet...