Elementor Addons by Livemesh <= 8.3.7 - Authenticated (Contributor+) Stored Cross-Site Scripting via Posts Grid

The Elementor Addons by Livemesh plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's Posts Grid widget in all versions up to, and including, 8.3.7 due to insufficient input sanitization and output escaping on user supplied attributes like 'grid_skin'. 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.