Memberships and User Profiles for WooCommerce <= 3.4 - Missing Authorization to Authenticated (Subscriber+) ProfileGrid Plugin Installation and Activation

The Memberships and User Profiles for WooCommerce – ProfileGrid WooCommerce Integration plugin for WordPress is vulnerable to unauthorized plugin installation and activation in versions up to, and including, 3.4. This is due to a missing capability check and missing nonce validation on the pg_install_profilegrid() AJAX handler registered via wp_ajax_pg_install_profilegrid. This makes it possible for authenticated attackers, with Subscriber-level access and above, to install and activate the ProfileGrid plugin from wordpress.