Booktics – Appointment Booking Calendar for Service Businesses: A security weakness
Booktics – Appointment Booking Calendar for Service Businesses is affected by a security weakness. The vulnerable path is reachable without authentication. The resulting impact depends on how the affected component exposes the vulnerable operation. The published affected range is <= 1.0.23.
- Component
- Booktics – Appointment Booking Calendar for Service Businesses
- Plugin slug
booktics- Affected
- <= 1.0.23
- Safe version
- See mitigation notes
- Published
- Sep 11, 2026
- Weakness
- CWE-862 — Missing Authorization
This CVE was published Sep 11, 2026 and is one of 7 known issues for this plugin.
Update, patch or deactivate.
No fixed release is identified. Update Booktics – Appointment Booking Calendar for Service Businesses when a release after 1.0.23 becomes available; until then, disable and remove it when the site's risk warrants. The official upstream changelog lists version 1.0.25, which is newer than the published affected range. Its changelog does not clearly confirm this specific fix, so it is not counted as a known-safe release.
No confirmed safe version is listed. Consider a vendor-supported patch or temporarily restricting the affected functionality while you assess the risk.
Deactivate only when warranted by your risk profile, or when advised by your hosting provider in the limited circumstances where the vulnerability cannot otherwise be mitigated. If you’re unsure which action is appropriate, contact Fused or your hosting provider for guidance.
Technical description
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 create_order_permission() permission callback on the POST /wp-json/booktics/v1/orders REST route unconditionally returning true, combined with find_and_update_guest() overwriting an existing customer record's stored name, phone, and wp_user_id 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.
CVE / CNA vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N