Hide Category by User Role for WooCommerce <= 2.3.1 - Missing Authorization to Unauthenticated Cache Flushing

The Hide Category by User Role for WooCommerce plugin for WordPress is vulnerable to Missing Authorization in all versions up to, and including, 2.3.1. This is due to a missing capability check on the admin_init hook that executes wp_cache_flush(). This makes it possible for unauthenticated attackers to flush the site's object cache via forged requests, potentially degrading site performance.