The WPCasa plugin for WordPress is vulnerable to Code Injection in all versions up to, and including, 1.4.1. This is due to insufficient input validation and restriction on the 'api_requests' function. This makes it possible for unauthenticated attackers to call arbitrary functions and execute code.
https://plugins.trac.wordpress.org/changeset/3365172/
https://plugins.trac.wordpress.org/browser/wpcasa/trunk/includes/class-wpsight-api.php#L48