Hydra Booking – All in One Appointment Booking System | Appointment Scheduling, Booking Calendar & WooCommerce Bookings <= 1.1.27 - Missing Payment Verification to Unauthenticated Payment Bypass

Client-Side Enforcement of Server-Side Security
CVE CVE-2025-12788
CVSS Medium (5.3)
Publicly Published November 10, 2025
Last Updated November 11, 2025
Researcher Ahmad Salem (a7mad.cc)
Description

The Hydra Booking — Appointment Scheduling & Booking Calendar plugin for WordPress is vulnerable to missing payment verification to unauthenticated payment bypass in all versions up to, and including, 1.1.27. This is due to the plugin accepting client-controlled payment confirmation data in the tfhb_meeting_paypal_payment_confirmation_callback function without server-side verification with PayPal's API. This makes it possible for unauthenticated attackers to bypass payment requirements and confirm bookings as paid without any actual payment transaction occurring.

References

1 affected software package

Software Type Plugin
Software Slug hydra-booking (view on wordpress.org)
Patched? Yes
Affected Version
  • <= 1.1.27
Patched Version
  • 1.1.28
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