CVE-2026-77689
Received Received - Intake

Unauthenticated Booking Payment Bypass in Appointments and Events Calendar

Publication date: 2026-09-12

Last updated on: 2026-09-12

Assigner: WPScan

Description
The Booking for Appointments and Events Calendar WordPress plugin before 9.8.1 does not verify that a payment was actually taken before recording a booking as paid, trusting the payment gateway named in a public, unauthenticated booking request even when the site has never configured that gateway. This lets an unauthenticated attacker obtain confirmed, fully paid appointments and events without any payment being collected.

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Meta Information

Published
2026-09-12
Last Modified
2026-09-12
Generated
2026-09-12
AI Q&A
2026-09-12
EPSS Evaluated
N/A
NVD
CVE-2026-77689
EUVD
EUVD-2026-76813

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
wpdevart booking_for_appointments_and_events_calendar to 9.8.1 (exc)
wpdevart amelia_pro From 9.0 (inc) to 9.8 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-UNKNOWN

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Executive Summary

This vulnerability affects the Booking for Appointments and Events Calendar WordPress plugin before version 9.8.1. It allows unauthenticated attackers to create paid bookings without actually making a payment. The plugin trusts the payment gateway specified in a public booking request, even if the site has never configured that gateway, and does not verify if a payment was processed before marking the booking as paid.

Detection Guidance

Check the installed version of the Amelia Pro plugin in your WordPress admin panel. If the version is between 9.0 and 9.8, the system is vulnerable. Look for unauthorized bookings marked as paid without actual payment records.

Impact Analysis

An attacker could exploit this to obtain confirmed appointments or events without paying, leading to financial loss for the service provider. It undermines trust in the booking system and could result in unauthorized access to paid services.

Compliance Impact

This vulnerability could lead to non-compliance with data protection regulations like GDPR or HIPAA if it results in unauthorized access to personal or sensitive appointment data. It may violate requirements for secure payment processing and data integrity.

Mitigation Strategies

Update the Amelia Pro plugin to version 9.8.1 or later immediately. Disable any unauthenticated booking requests if possible. Review recent bookings for suspicious entries marked as paid without payment verification.

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