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...

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:...

Cross-site Scripting (XSS)

Overview Affected versions of this package are vulnerable to Cross-site Scripting XSS via the displaymap parser function when unescaped user input is passed to the overlays parameter. An attacker can execute arbitrary JavaScript in the context of users viewing the affected page by injecting...

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:...