Element Pack Addons for Elementor <= 8.3.4 - Authenticated (Contributor+) Stored Cross-Site Scripting via Open Street Map widget

The Element Pack Addons for Elementor plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the Open Street Map widget's marker content parameter in all versions up to, and including, 8.3.4. This is due to insufficient input sanitization and output escaping on user-supplied attributes in the render function. This makes it possible for authenticated attackers, with contributor level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.