Bookit — Booking & Appointment Calendar <= 2.6.0.6 - Unauthenticated Payment Bypass via 'bookit_book_appointment' AJAX Action
- ID
- WPSEC-2026-2149
- Plugin
- Bookit — Booking & Appointment Calendar (bookit)
- Affected
- all versions before 2.6.0.7
- Remediation
- Update to 2.6.0.7 or later.
- CVSS 3.1
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
- Weakness
- CWE-840
- Usage
- Plugin Low · Affected versions None seen among sites WPSec scans, 2026-10-30
- Attack surface
- Bookit — Booking & Appointment Calendar on WPSec AttackSurface
- Fix released
- Published
Description
The Bookit — Booking & Appointment Calendar plugin for WordPress is vulnerable to Payment Bypass via the public 'bookit_book_appointment' AJAX action in all versions up to, and including, 2.6.0.6, due to insufficient server-side validation of the booking price and payment method. When the chosen staff member does not offer the chosen service, the price lookup returns null, which a submitted price of 0 passes. A zero price also skips the payment-method check. The handler checks only that the submitted payment method exists in the settings, not that it is enabled. This makes it possible for unauthenticated attackers to book a paid service at a price of zero, or to choose a payment method the site owner has disabled, such as paying on site, and so avoid the required online payment.
References
- https://wpsec.com/vuln/WPSEC-2026-2149/
- https://plugins.svn.wordpress.org/bookit/tags/2.6.0.7/
- https://wordpress.org/plugins/bookit/
Published by WPSec. Provided as is, without warranty. Corrections: contact us.
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