Description
The Booking calendar, Appointment Booking System plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 3.2.36. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for unauthenticated attackers to mark arbitrary reservations as paid or completed, cancel legitimate payments, auto-approve reservations, and trigger transactional booking emails by writing attacker-supplied payment status and transaction data directly into the payments table. The auto-approval of reservations is only triggered when the 'enable_psuccess_approval' site option is enabled, but payment status manipulation and email dispatch are exploitable regardless of that setting.
References9
- plugins.trac.wordpress.org/browser/booking-calendar/tags/3.2.35…
- plugins.trac.wordpress.org/browser/booking-calendar/tags/3.2.35…
- plugins.trac.wordpress.org/browser/booking-calendar/tags/3.2.35…
- plugins.trac.wordpress.org/browser/booking-calendar/tags/3.2.35…
- plugins.trac.wordpress.org/browser/booking-calendar/tags/3.2.36…
- plugins.trac.wordpress.org/browser/booking-calendar/tags/3.2.36…
- plugins.trac.wordpress.org/browser/booking-calendar/tags/3.2.36…
- plugins.trac.wordpress.org/browser/booking-calendar/tags/3.2.36…
- www.wordfence.com/threat-intel/vulnerabilities/id/88409bb0-5cb0…
Metrics
- CVSS 3.1
-
5.3
MEDIUM
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N - EPSS — exploit probability
- 1% percentile: 46 · as of 12 November 2026
- CWE
- CWE-862
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.