CVE-2026-94229 in TrueBooker Plugin
Summary
by MITRE • 10/19/2026
The TrueBooker WordPress plugin before 1.3.0 does not verify that the requester owns a booking before rendering its confirmation summary, allowing unauthenticated attackers to enumerate booking identifiers and retrieve the personal information of customers who booked an appointment, as well as invalidate the customer's own confirmation link.
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Analysis
by VulDB Data Team • 10/19/2026
The TrueBooker WordPress plugin prior to version 1.3.0 contains a critical access control vulnerability that stems from insufficient verification of user ownership over specific resources. This flaw allows unauthenticated attackers to bypass security mechanisms intended to restrict access to sensitive booking data. The core technical issue lies in the application logic used to render confirmation summaries for appointments. Instead of validating whether the current request originates from an authenticated user who is legitimately associated with a particular booking, the system blindly processes requests based solely on provided identifiers. This lack of authorization checks creates a direct path for information disclosure and potential service disruption.
From a technical perspective, this vulnerability represents a classic Broken Access Control issue where the application fails to enforce proper policies regarding which users are allowed to access specific resources. An attacker can exploit this by manipulating booking identifier parameters in HTTP requests. By iterating through sequential or predictable identifiers, an unauthenticated actor can systematically enumerate valid bookings within the system. This process does not require any form of authentication, making it particularly dangerous as it lowers the barrier for entry significantly. The vulnerability aligns with CWE-284 Improper Access Control and CWE-601 URL Redirection to Untrusted Site which may be involved if confirmation links are mishandled during this enumeration process.
The operational impact of this flaw is severe, primarily concerning data privacy and integrity. Successful exploitation allows attackers to retrieve personally identifiable information associated with customers who have booked appointments through the plugin. This includes names, contact details, and potentially other sensitive data depending on what fields are included in the confirmation summary output. Beyond mere data theft, the vulnerability also enables an attacker to invalidate a customer's own confirmation link. By manipulating or intercepting these links during the enumeration process, malicious actors can prevent legitimate users from accessing their appointment confirmations, leading to confusion and potential loss of business for service providers relying on the plugin.
This type of attack is often categorized under reconnaissance activities in threat intelligence frameworks such as MITRE ATT&CK, specifically relating to techniques used to gather information about a target environment without detection. The ability to enumerate resources and extract sensitive data contributes significantly to an attacker's situational awareness, potentially facilitating further targeted attacks against specific individuals or the organization hosting the WordPress site. It highlights the critical importance of implementing robust authorization checks that verify not just who is making the request but also whether they have a legitimate relationship with the requested resource.
To mitigate this vulnerability, administrators must upgrade to TrueBooker version 1.3.0 or later where these access control issues are addressed. In addition to updating the plugin, it is advisable to implement additional security layers such as Web Application Firewalls that can detect and block automated enumeration attempts based on request patterns. Regular audits of user input handling and strict enforcement of ownership verification for all sensitive endpoints should be standard practice in WordPress development. Ensuring that every API endpoint or page rendering logic includes a check against the authenticated user's session data relative to the requested resource ID is essential to prevent similar access control failures in future updates or other plugins.