The Mapplic and Mapplic Lite plugins for WordPress are vulnerable to Server-Side Request Forgery in versions up to, and including 6.1, 1.0 respectively. This makes it possible for attackers to forgery requests coming from a vulnerable site's server and ultimately perform an XSS attack if requesting an SVG file.
https://www.mapplic.com/docs/#changelog
https://plugins.trac.wordpress.org/changeset/2503447