Update the WordPress Appointment Hour Booking plugin to the latest available version (at least 1.3.72).
István Márton discovered and reported this Broken Access Control vulnerability in WordPress Appointment Hour Booking Plugin. A broken access control issue refers to a missing authorization, authentication or nonce token check in a function that could lead to an unprivileged user to executing a certain higher privileged action. This vulnerability has been fixed in version 1.3.72.
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