---
id: CVE-2026-12905
title: >-
  The Bookly plugin for WordPress is vulnerable to Insecure Direct Object
  Reference in versions up to, and including, 27.7 via the appointment() method
  of the Mobile Staff Cabinet API (resource=appointment,
  action=bookly_mobile_staff_cabin…
summary: >-
  The Bookly plugin for WordPress is vulnerable to Insecure Direct Object
  Reference in versions up to, and including, 27.7 via the appointment() method
  of the Mobile Staff Cabinet API (resource=appointment,
  action=bookly_mobile_staff_cabin…
severity: medium
cvss: 4.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N'
cwe:
  - CWE-639
published: '2026-08-16'
updated: '2026-08-16'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-12905'
references:
  - url: >-
      https://plugins.trac.wordpress.org/browser/bookly-responsive-appointment-booking-tool/tags/24.9/frontend/modules/mobile_staff_cabinet/Ajax.php#L17
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/bookly-responsive-appointment-booking-tool/tags/24.9/frontend/modules/mobile_staff_cabinet/api/handlers/Handler.php#L82
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/bookly-responsive-appointment-booking-tool/tags/24.9/frontend/modules/mobile_staff_cabinet/api/handlers/Handler1_0.php#L70
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/bookly-responsive-appointment-booking-tool/tags/27.7/frontend/modules/mobile_staff_cabinet/Ajax.php#L17
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/bookly-responsive-appointment-booking-tool/tags/27.7/frontend/modules/mobile_staff_cabinet/api/handlers/Handler.php#L82
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/bookly-responsive-appointment-booking-tool/tags/27.7/frontend/modules/mobile_staff_cabinet/api/handlers/Handler1_0.php#L70
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/changeset?reponame=&old=3637918%40bookly-responsive-appointment-booking-tool&new=3637918%40bookly-responsive-appointment-booking-tool
    label: security@wordfence.com
  - url: >-
      https://www.wordfence.com/threat-intel/vulnerabilities/id/1600466e-ad45-4dc7-916b-6c97301d2b03?source=cve
    label: security@wordfence.com
tags:
  - nvd
ingestedAt: '2026-08-16T13:39:06.172Z'
epss: 0.0029
epssPercentile: 0.21794
---

## Overview

The Bookly plugin for WordPress is vulnerable to Insecure Direct Object Reference in versions up to, and including, 27.7 via the appointment() method of the Mobile Staff Cabinet API (resource=appointment, action=bookly_mobile_staff_cabinet) in frontend/modules/mobile_staff_cabinet/api/handlers/Handler1_0.php. This is due to the handler loading an Appointment by the attacker-supplied params[id] without verifying that the appointment's staff_id matches the authenticated staff member, whereas sibling operations (deleteAppointment, saveAppointment, appointments list) correctly scope to $this->staff->getId() when $this->role === ROLE_STAFF. This makes it possible for authenticated attackers, with staff-level mobile cabinet access (any valid access_key token bound to a Staff entity), to read appointment details — including the internal note and the full customer_appointments collection (customer full_name, email, phone, notes, custom_fields, extras, payment_total, payment_type, payment_status) — belonging to other staff members by enumerating sequential appointment IDs.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.