CVE-2026-6723

MediumCVSS 5.3/10Last modified Oct 13, 2026

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.

Metrics

CVSS 3.1 5.3/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Weakness enumeration

CWE-863

Affected software

No affected versions have been published.

Timeline

Published
Oct 10, 2026
Last modified
Oct 13, 2026
NVD status
Deferred

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CVE-2026-6723: Medium severity, CVSS 5.3 | Vulnix