CVE-2026-6723CWE-863broken-access-control

CVE-2026-6723

Medium · published October 10, 2026

CVSS v3.1
5.3
EPSS
0%
Percentile
8.1
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00189 · 8.1th percentile
Weakness
CWE-863 · Incorrect Authorization
Published
2026-10-10T09:16Z
References (2)
https://plugins.trac.wordpress.org/changeset/3562241/simply-schedule-appointments · [email protected]https://www.wordfence.com/threat-intel/vulnerabilities/id/b6f16178-1aa3-4af2-a125-74467bc57e70?source=cve · [email protected]
EPSS history
Timeline
  • 11 OCT 03:31Z
    EPSS moved — → 0%
    epss
  • 10 OCT 04:26Z
    Appointment Booking Calendar <= 1.6.11.11 - Incorrect Authorization to Unauthenticated Sensitive Field Modification via Appointment Public Token
    cvelistv5
  • 10 OCT 04:26Z
    Appointment Booking Calendar <= 1.6.11.11 - Incorrect Authorization to Unauthenticated Sensitive Field Modification via Appointment Public Token
    cvelistv5