DHL eCommerce (Benelux) for WooCommerce <= 2.2.3 - Missing Authorization to Authenticated (Subscriber+) Arbitrary Shipping Label Creation and Deletion via dhlpwc_label_create and dhlpwc_label_delete AJAX Actions

The DHL eCommerce (Benelux) for WooCommerce plugin for WordPress is vulnerable to unauthorized modification and loss of data due to a missing capability check and missing nonce verification on the create_label() and delete_label() functions in versions up to, and including, 2.2.3. These functions are wired to the wp_ajax_dhlpwc_label_create and wp_ajax_dhlpwc_label_delete hooks and act on an attacker-supplied post_id (WooCommerce order ID). This makes it possible for authenticated attackers, with Subscriber-level access and above, to create or delete DHL shipping labels associated with any WooCommerce order on the site.