---
id: CVE-2026-93399
title: >-
  The Bookly plugin for WordPress is vulnerable to Insecure Direct Object
  Reference in versions up to, and including, 28.2 via the 'bookly_get_form_id',
  'bookly_render_complete', 'bookly_add_to_calendar' and 'bookly_rollback_order'
  AJAX ac…
summary: >-
  The Bookly plugin for WordPress is vulnerable to Insecure Direct Object
  Reference in versions up to, and including, 28.2 via the 'bookly_get_form_id',
  'bookly_render_complete', 'bookly_add_to_calendar' and 'bookly_rollback_order'
  AJAX ac…
severity: critical
cvss: 9.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H'
cwe:
  - CWE-639
vendor: ladela
product: Online Scheduling and Appointment Booking System – Bookly
affected:
  - online_scheduling_and_appointment_booking_system_bookly <= 28.2
published: '2026-09-25'
updated: '2026-09-25'
sourceUpdated: '2026-09-25T13:08:26.930'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-93399'
references:
  - url: >-
      https://plugins.trac.wordpress.org/browser/bookly-responsive-appointment-booking-tool/tags/28.2/frontend/modules/booking/Ajax.php#L1111
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/bookly-responsive-appointment-booking-tool/tags/28.2/frontend/modules/booking/Ajax.php#L46
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/bookly-responsive-appointment-booking-tool/tags/28.2/frontend/modules/booking/Ajax.php#L733
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/bookly-responsive-appointment-booking-tool/tags/28.2/frontend/modules/payment/Ajax.php#L74
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/bookly-responsive-appointment-booking-tool/tags/28.2/lib/UserBookingData.php#L360
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/bookly-responsive-appointment-booking-tool/tags/28.2/lib/base/Gateway.php#L301
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/changeset?reponame=&old=3707284%40bookly-responsive-appointment-booking-tool&new=3707284%40bookly-responsive-appointment-booking-tool
    label: security@wordfence.com
  - url: >-
      https://www.wordfence.com/threat-intel/vulnerabilities/id/d45a01e5-0e69-4d95-b609-b9002b3776da?source=cve
    label: security@wordfence.com
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-25T07:01:12.108Z'
---

## Overview

The Bookly plugin for WordPress is vulnerable to Insecure Direct Object Reference in versions up to, and including, 28.2 via the 'bookly_get_form_id', 'bookly_render_complete', 'bookly_add_to_calendar' and 'bookly_rollback_order' AJAX actions. This is due to the 'bookly_get_form_id' handler blindly storing the attacker-controlled 'order_id' from the submitted form_data into a new booking session, which the 'bookly_render_complete' handler then trusts to look up and return the corresponding Order's secret token without verifying that the current session created that order. This makes it possible for unauthenticated attackers to enumerate sequential order IDs, disclose other customers' order tokens, retrieve calendar/appointment information via 'bookly_add_to_calendar' and permanently delete arbitrary non-completed bookings via 'bookly_rollback_order', which cascade-deletes the customer_appointment and (when no other customers are attached) the underlying appointment.

## Remediation

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