WP Travel Engine < 6.8.5 - Unauthenticated Booking Details Disclosure and Modification via wte_add_trip_to_cart

Description

The plugin does not perform authorization or ownership checks when loading a caller-supplied booking identifier in one of its unauthenticated cart actions, allowing unauthenticated attackers to disclose any customer's booking order details and their stored billing information, and to overwrite that customer's booking record with their own data.