The Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin plugin for WordPress is vulnerable to Incorrect Authorization in all versions up to, and including, 1.6.11.11. This is due to the appointment update REST API endpoint not restricting which fields can be modified by token-authenticated customers. This makes it possible for unauthenticated attackers to modify admin-controlled fields on that appointment, including faking payment confirmation, reassigning the appointment to another user, and changing the service type.
History

Mon, 19 Oct 2026 11:45:00 +0000

Type Values Removed Values Added
First Time appeared Croixhaug
Croixhaug simply Schedule Appointments
Wordpress-extensions
Wordpress-extensions simply Schedule Appointments
Vendors & Products Croixhaug
Croixhaug simply Schedule Appointments
Wordpress-extensions
Wordpress-extensions simply Schedule Appointments

Sun, 11 Oct 2026 17:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Sat, 10 Oct 2026 04:30:00 +0000

Type Values Removed Values Added
Description The Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin plugin for WordPress is vulnerable to Incorrect Authorization in all versions up to, and including, 1.6.11.11. This is due to the appointment update REST API endpoint not restricting which fields can be modified by token-authenticated customers. This makes it possible for unauthenticated attackers to modify admin-controlled fields on that appointment, including faking payment confirmation, reassigning the appointment to another user, and changing the service type.
Title Appointment Booking Calendar <= 1.6.11.11 - Incorrect Authorization to Unauthenticated Sensitive Field Modification via Appointment Public Token
Weaknesses CWE-863
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: 2026-10-10T04:26:46.386Z

Updated: 2026-10-11T16:55:19.318Z

Reserved: 2026-04-20T19:51:21.160Z

Link: CVE-2026-6723

cve-icon Vulnrichment

Updated: 2026-10-11T16:46:17.976Z

cve-icon NVD

Status : Deferred

Published: 2026-10-10T05:16:40.147

Modified: 2026-10-13T13:29:12.567

Link: CVE-2026-6723

cve-icon Redhat

No data.