Vulnerability in Appointment Booking Plugin – LatePoint | Calendar & Scheduling for WordPress — CVE-2026-17538

What to do now

Update Appointment Booking Plugin – LatePoint | Calendar & Scheduling for WordPress to 5.6.10 or later.

Affected versions

• Everything up to and including 5.6.9

The LatePoint - Appointment Booking & Reservation plugin for WordPress is vulnerable to Insecure Direct Object Reference in versions up to, and including, 5.6.9. This is due to the process_step_customer() function using is_user_logged_in() as the sole gate before merging POSTed customer data into an existing LatePoint customer, without any ownership checks. This makes it possible for authenticated attackers, with Subscriber-level access and above, to modify the personal information (first name, last name, email, phone, notes) of arbitrary LatePoint customers, and, when the contact_merge setting is 'phone', to overwrite the victim's email address and take over the account via a password reset.

This description is reproduced verbatim from the public vulnerability record.

• https://www.wordfence.com/threat-intel/vulnerabilities/id/83cdc51f-b5e1-42b9-972a-7e781f97b43e?source=api-prod

Part of this record comes from Wordfence Intelligence. Original: https://www.wordfence.com/threat-intel/vulnerabilities/id/83cdc51f-b5e1-42b9-972a-7e781f97b43e
Copyright 2012-2026 Defiant Inc. / Full license text

This page is compiled automatically from public databases. Accuracy is not guaranteed; confirm against the vendor advisory before acting.