WordPress · Latepoint · CVE-2026-17538
**Name of the Vulnerable Software and Affected Versions**
LatePoint - Appointment Booking & Reservation plugin for WordPress versions prior to 5.7.0
**Description**
An Insecure Direct Object Reference exists because the `process step customer()` function relies solely on `is user logged in()` to validate requests before merging POSTed customer data into an existing record, lacking necessary ownership checks. Authenticated users with Subscriber-level access or higher can modify the personal information of arbitrary customers, including first name, last name, email, phone, and notes. Additionally, if the `contact merge` setting is configured as 'phone', an attacker can overwrite a victim's email address to facilitate account takeover through a password reset.
**Recommendations**
Update the plugin to a version later than 5.6.9.