Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in MapsMarker.Com e.U. Leaflet Maps Marker allows Stored XSS.This issue affects Leaflet Maps Marker: from n/a through 3.12.9.
The Leaflet Maps Marker WordPress plugin before 3.12.7 does not validate and escape one of its shortcode attributes, which could allow users with a role as low as contributor to perform Stored Cross-Site Scripting attack.