Unauthenticated Booking Approval in Timetics WordPress Plugin

Executive Summary

The Timetics WordPress plugin before version 1.0.57 has a flaw where it does not check if bookings made through non-recognized payment methods should be pending or unpaid. This allows unauthenticated users to create fully approved bookings for paid appointments without making any payment by sending a single POST request to the plugin's API.

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Detection Guidance

Check if your Timetics WordPress plugin version is below 1.0.57. Inspect server logs for unauthenticated POST requests to the plugin's API endpoint creating bookings without payment. Look for unexpected approved bookings in the system.

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Impact Analysis

This vulnerability could allow attackers to book paid appointments without paying, leading to lost revenue, overbooked schedules, and potential disruption of services. It may also trigger unnecessary confirmations, emails, and calendar events for unpaid bookings.

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Compliance Impact

This vulnerability could lead to non-compliance with GDPR and HIPAA by allowing unauthorized creation of appointments without payment verification. Unpaid bookings may expose personal data in confirmation emails or calendar events, violating data protection requirements for secure handling of sensitive information.

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Mitigation Strategies

Update the Timetics WordPress plugin to version 1.0.57 or later immediately. Review all recent bookings for unauthorized approved appointments and cancel any suspicious ones. Monitor the plugin's API endpoint for unusual POST requests.

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