Order Splitter for WooCommerce <= 5.3.5 - Missing Authorization to Authenticated (Subscriber+) Order Information Exposure

The Order Splitter for WooCommerce plugin for WordPress is vulnerable to unauthorized access of data due to a missing capability check on the 'wos_troubleshooting' AJAX endpoint in all versions up to, and including, 5.3.5. This makes it possible for authenticated attackers, with Subscriber-level access and above, to view information pertaining to other user's orders.