WooCommerce PayPal Payments <= 3.3.2 - Unauthenticated Sensitive Information Disclosure

The WooCommerce PayPal Payments plugin for WordPress is vulnerable to Sensitive Information Disclosure due to an Insecure Direct Object Reference in all versions up to, and including, 3.3.2 via the enqueue_paypal_insights_script_on_order_received() function due to missing validation on a user controlled key. This makes it possible for unauthenticated attackers to obtain sensitive order information including order keys, which can then be leveraged to access full customer billing details (name, email, phone, address) via the WooCommerce Store API within a 10-minute grace period after order creation.