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:...