Netcash WooCommerce Payment Gateway <= 4.1.3 - Missing Authorization to Unauthenticated Order Status Modification

The Netcash WooCommerce Payment Gateway plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the handle_return_url function in all versions up to, and including, 4.1.3. This makes it possible for unauthenticated attackers to mark any WooCommerce order as processing/completed.