CVE-2026-14349 in TrueBooker Plugin
Summary
by MITRE • 09/16/2026
The TrueBooker – Appointment Booking and Scheduler System plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 1.2.3. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for unauthenticated attackers to modify the email address of arbitrary user accounts, including administrators, which can be leveraged to reset the account's password and gain access to it.
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Analysis
by VulDB Data Team • 09/16/2026
The TrueBooker – Appointment Booking and Scheduler System plugin for WordPress contains a critical authorization bypass vulnerability affecting all versions up to and including 1.2.3. This flaw stems from an insufficient verification of user privileges when processing administrative actions within the application logic. Specifically, the software fails to enforce proper access controls on endpoints responsible for modifying user account details. As a result, any individual with network connectivity to the WordPress instance can interact with these functions without possessing valid authentication credentials or sufficient role-based permissions. This represents a fundamental failure in implementing secure design principles where privilege checks are not rigorously applied before executing state-changing operations that affect other users' data.
The technical nature of this vulnerability allows unauthenticated attackers to manipulate arbitrary user accounts by altering their associated email addresses. By exploiting the lack of authorization checks, an attacker can send crafted requests to change the email field for any existing account on the system, including those belonging to administrators with full control over the WordPress environment. This capability is particularly dangerous because it serves as a precursor to more severe compromise scenarios. Once the email address associated with an administrator account is changed to one controlled by the attacker, they can initiate a password reset procedure using that new email address. Since most content management systems rely on email-based verification for credential recovery, this effectively grants the attacker full access to the compromised administrative account without needing to know or guess the original password.
The operational impact of this vulnerability is severe, as it directly leads to unauthorized remote code execution capabilities through social engineering and automated tooling rather than direct exploitation of server-side logic flaws in the core platform. An attacker who successfully exploits this issue can take complete control over the WordPress installation. This includes the ability to modify website content, install malicious plugins or themes that may contain web shells or backdoors, access sensitive database information containing customer data or business intelligence, and potentially pivot into other systems within the organization's network if trust relationships exist between the web server and internal services. The compromise of an administrative account undermines the integrity, confidentiality, and availability of the entire hosted application ecosystem.
This vulnerability aligns with CWE-284 Improper Access Control, as it involves a failure to restrict access to resources based on user identity or role. Furthermore, in terms of offensive security frameworks such as MITRE ATT&CK for Enterprise, this exploit maps to T1078 Valid Accounts and specifically the subtechnique of using default credentials or exploiting misconfigurations to gain initial foothold via account manipulation. The attack vector is classified under Remote Code Execution prerequisites where privilege escalation occurs through credential theft rather than direct code injection. Organizations relying on this plugin are advised to immediately update to a patched version that implements strict role-based access control checks for all administrative endpoints. Additionally, implementing multi-factor authentication and monitoring user activity logs can provide additional layers of defense against such unauthorized modifications even if similar vulnerabilities exist in other plugins or core components.