WP Booking System <= 2.1.0.3 - Authenticated (Subscriber+) Missing Authorization to Form Settings Update
- ID
- WPSEC-2026-1182
- Plugin
- WP Booking System – Booking Calendar (wp-booking-system)
- Affected
- all versions before 2.1.0.4
- Remediation
- Update to 2.1.0.4 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, 2026-10-22
- Attack surface
- WP Booking System on WPSec AttackSurface
- Fix released
- Published
Also published later by Wordfence as CVE-2026-109369, on 2026-10-16.
Description
The WP Booking System plugin for WordPress is vulnerable to unauthorized modification of data in all versions up to, and including, 2.1.0.3, due to a missing capability and per-form access check in the wpbs_action_edit_form() form save action, which only verified a nonce that is not tied to a specific form. The wpbs_save_user_restrictions_edit_form_fields() hook, which saves form user restrictions, also did not check the user's capability. This makes it possible for authenticated attackers, with subscriber-level access and above, who have been granted access to at least one form, to change the settings of any other form. They can also rewrite a form's 'user_permission' entries to give themselves or other users edit access to it.
References
- https://wpsec.com/vuln/WPSEC-2026-1182/
- https://plugins.svn.wordpress.org/wp-booking-system/tags/2.1.0.4/
- https://wordpress.org/plugins/wp-booking-system/
Published by WPSec. Provided as is, without warranty. Corrections: contact us.
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