The Five Star Restaurant Reservations WordPress plugin before 2.7.23 does not verify the authenticity of incoming payment notifications, failing to validate the payment recipient, amount, and status or to bind the notification to the intended booking, allowing unauthenticated attackers to mark arbitrary pending reservations as paid and confirmed.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
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