The Appointment Booking Calendar plugin for WordPress is vulnerable to Missing Authorization in all versions up to, and including, 1.3.96. This is due to the plugin exposing an unauthenticated booking processing endpoint (cpabc_appointments_check_IPN_verification) that trusts attacker-supplied payment notifications without verifying their origin, authenticity, or requiring proper authorization checks. This makes it possible for unauthenticated attackers to arbitrarily confirm bookings and insert them into the live calendar via the 'cpabc_ipncheck' parameter, triggering administrative and customer notification emails and disrupting operations.
History

Mon, 24 Nov 2025 20:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Mon, 24 Nov 2025 09:15:00 +0000

Type Values Removed Values Added
First Time appeared Codepeople
Codepeople appointment Booking Calendar
Wordpress
Wordpress wordpress
Vendors & Products Codepeople
Codepeople appointment Booking Calendar
Wordpress
Wordpress wordpress

Sat, 22 Nov 2025 07:45:00 +0000

Type Values Removed Values Added
Description The Appointment Booking Calendar plugin for WordPress is vulnerable to Missing Authorization in all versions up to, and including, 1.3.96. This is due to the plugin exposing an unauthenticated booking processing endpoint (cpabc_appointments_check_IPN_verification) that trusts attacker-supplied payment notifications without verifying their origin, authenticity, or requiring proper authorization checks. This makes it possible for unauthenticated attackers to arbitrarily confirm bookings and insert them into the live calendar via the 'cpabc_ipncheck' parameter, triggering administrative and customer notification emails and disrupting operations.
Title Appointment Booking Calendar <= 1.3.96 - Missing Authorization to Arbitrary Booking Confirmation via 'cpabc_ipncheck' Parameter
Weaknesses CWE-862
References
Metrics cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: Wordfence

Published: 2025-11-22T07:29:18.875Z

Updated: 2025-11-24T19:30:08.188Z

Reserved: 2025-11-17T15:15:33.423Z

Link: CVE-2025-13317

cve-icon Vulnrichment

Updated: 2025-11-24T19:30:02.956Z

cve-icon NVD

Status : Received

Published: 2025-11-22T08:15:44.417

Modified: 2025-11-22T08:15:44.417

Link: CVE-2025-13317

cve-icon Redhat

No data.