CVE-2026-11446: Booktics – Booking Calendar for Appointments and Service Businesses <= 1.0.23 - Missing Authorization
The Booktics – Booking Calendar for Appointments and Service Businesses plugin for WordPress is vulnerable to unauthorized modification of data in all versions up to, and including, 1.0.23. This is due to the createorderpermission() permission callback on the POST /wp-json/booktics/v1/orders REST route unconditionally returning true, combined with findandupdateguest() overwriting an existing customer record's stored name, phone, and wpuserid whenever the caller-supplied email matches, with no proof of ownership. This makes it possible for unauthenticated attackers to overwrite the contact details (name and phone) of any existing customer whose email address they know, poisoning downstream reminder emails, SMS, calendar invites, and CRM data.
Affected Software
Event History
Frequently Asked Questions
What does an attacker need to target a customer record?
The attacker needs to know the email address of an existing customer. No authentication or proof of ownership of that email is required.
Which customer data can be altered, and what are the operational consequences?
An attacker can overwrite the stored customer name and phone number, and the affected update path also overwrites the stored wp_user_id. This can poison contact information used by reminder emails, SMS messages, calendar invitations, and CRM systems.
Which installations are in scope?
All versions of the Booktics – Booking Calendar for Appointments and Service Businesses WordPress plugin through 1.0.23, including 1.0.23, are affected.