Fluent Booking – The Ultimate Appointments Scheduling, Events Booking, Events Calendar Solution <= 2.5.0 - Authenticated (Subscriber+) Insecure Direct Object Reference to Guest Bookings via My Bookings List
- ID
- WPSEC-2026-2590
- Plugin
- Fluent Booking – The Ultimate Appointments Scheduling, Events Booking, Events Calendar Solution (fluent-booking)
- Affected
- all versions before 2.6.0
- Remediation
- Update to 2.6.0 or later.
- CVSS 3.1
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
- Weakness
- CWE-639
- Usage
- Plugin Low · Affected versions Low among sites WPSec scans, 2026-11-05
- Attack surface
- Fluent Booking – The Ultimate Appointments Scheduling, Events Booking, Events Calendar Solution on WPSec AttackSurface
- Fix released
- Published
Description
The Fluent Booking plugin for WordPress is vulnerable to Insecure Direct Object Reference via the 'My Bookings' list ([fluent_booking_lists] shortcode and the front-end bookings endpoint) in all versions up to, and including, 2.5.0. This is due to the list selecting bookings by the logged-in user's email address alone, with no check that the booking belongs to that account, while WordPress lets a user change their account email through the REST API without verifying the inbox. This makes it possible for authenticated attackers, with subscriber-level access and above, to set their account email to a guest's address and then view that guest's bookings. The list also links to each booking's management page, so the attacker can cancel or reschedule them.
References
- https://wpsec.com/vuln/WPSEC-2026-2590/
- https://plugins.svn.wordpress.org/fluent-booking/tags/2.6.0/
- https://wordpress.org/plugins/fluent-booking/
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