CVE-2026-103366

The Appointment Booking Plugin – LatePoint | Calendar & Scheduling for WordPress plugin for WordPress is vulnerable to Insecure Direct Object Reference in versions up to, and including, 5.7.3 via the booking[id] and cart[id] parameters on the steps reload booking form summary panel and steps start public routes (reachable through wp ajax nopriv latepoint route call). This is due to OsStepsHelper::set required objects() feeding raw request parameters into set booking object() and set cart object(), which call OsModel::set data() and load an arbitrary booking or cart row by primary key with no ownership check — the ownership guard the vendor added for the earlier disclosure lives only inside OsStepsHelper::load step() and does not cover the sibling routes or cart[id] at all. This makes it possible for unauthenticated attackers to enumerate sequential booking / cart identifiers and read other customers' appointment details (service name, agent, date/time, duration, price breakdown, status) and other shoppers' pending checkout contents directly from the JSON responses.