The Appointment Booking Calendar plugin for WordPress is vulnerable to Missing Authorization in versions up to and including 1.6.10.6. This is due to a flawed authorization logic in the nonce_permissions_check() method combined with the public exposure of a site-wide reusable nonce. The plugin exposes a public_nonce value through the /wp-json/ssa/v1/embed-inner endpoint, which is accessible to unauthenticated users. The appointment deletion endpoint at /wp-json/ssa/v1/appointments/{id}/delete and /wp-json/ssa/v1/appointments/bulk use a permission check that accepts requests containing both an X-WP-Nonce header (with any arbitrary value) and an X-PUBLIC-Nonce header (with the valid public nonce). When the X-WP-Nonce validation fails, the function falls back to validating the X-PUBLIC-Nonce without properly rejecting the request. Since the public_nonce is exposed to all unauthenticated visitors and is site-wide (not user-specific or appointment-specific), attackers can obtain it and use it to view details of arbitrary appointments, including the public_edit_url, or delete arbitrary appointments by ID. This makes it possible for unauthenticated attackers to view, delete or modify any appointment in the system, disclosing sensitive appointment data, causing service disruption, and loss of booking records.
The Appointment Booking Calendar WordPress plugin versions up to 1.6.10.6 contain a missing authorization vulnerability allowing unauthenticated users to delete appointments via a publicly exposed nonce. Attackers can exploit flawed authorization logic in the nonce validation to bypass security checks and perform unauthorized appointment deletions.
تحتوي إضافة Appointment Booking Calendar للـ WordPress على خلل في منطق التفويض حيث يتم الكشف عن nonce عام يمكن الوصول إليه من قبل المستخدمين غير المصرح لهم. يمكن للمهاجمين استخدام هذا الـ nonce العام للتحايل على فحوصات التحقق وحذف المواعيد بشكل غير مصرح به من خلال نقاط نهاية REST API. الثغرة تؤثر على الإصدارات حتى 1.6.10.6 وتتطلب تحديثاً فورياً.
The Appointment Booking Calendar WordPress plugin versions up to 1.6.10.6 contain a missing authorization vulnerability allowing unauthenticated users to delete appointments via a publicly exposed nonce. Attackers can exploit flawed authorization logic in the nonce validation to bypass security checks and perform unauthorized appointment deletions.
Update the Appointment Booking Calendar plugin to version 1.6.10.7 or later immediately. Implement proper authorization checks that do not rely solely on nonce validation. Restrict access to the /wp-json/ssa/v1/embed-inner endpoint and ensure all appointment deletion endpoints require authenticated user sessions with proper capability checks.
قم بتحديث إضافة Appointment Booking Calendar إلى الإصدار 1.6.10.7 أو أحدث فوراً. قم بتنفيذ فحوصات تفويض مناسبة لا تعتمد على التحقق من nonce وحده. قيد الوصول إلى نقطة النهاية /wp-json/ssa/v1/embed-inner وتأكد من أن جميع نقاط نهاية حذف المواعيد تتطلب جلسات مستخدم مصرح بها مع فحوصات القدرات المناسبة.