Vulnerabilities / Booking System / WPSEC-2026-1704
Booking System <= 2.1.0.5 - Authenticated (Subscriber+) Missing Authorization to Add Booking Calendar Options Update
Medium 4.3
CWE-862Fixed in 2.1.0.6
- ID
- WPSEC-2026-1704
- Plugin
- WP Booking System – Booking Calendar (wp-booking-system)
- Affected
- all versions before 2.1.0.6
- Remediation
- Update to 2.1.0.6 or later.
- CVSS 3.1
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
- Weakness
- CWE-862
- Usage
- Plugin Low · Affected versions Low among sites WPSec scans, 2026-10-27
- Attack surface
- Booking System on WPSec AttackSurface
- Fix released
- Published
Description
The WP Booking System plugin for WordPress is vulnerable to unauthorized modification of data via the 'wpbs_add_booking_save_calendar_options' AJAX action in all versions up to, and including, 2.1.0.5, due to a missing capability check and missing nonce validation on the wpbs_action_ajax_add_booking_save_calendar_options() function. This makes it possible for authenticated attackers, with Subscriber-level access and above, to overwrite the manual booking options stored for any calendar.
References
- https://wpsec.com/vuln/WPSEC-2026-1704/
- https://plugins.svn.wordpress.org/wp-booking-system/tags/2.1.0.6/
- https://wordpress.org/plugins/wp-booking-system/
Published by WPSec. Provided as is, without warranty. Corrections: contact us.
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