CVE-2026-14221 in Easy Appointments Plugin
Summary
by MITRE • 07/30/2026
The Easy Appointments WordPress plugin through 3.12.26 does not perform capability checks in several of its appointment-management actions, relying only on a nonce that any authenticated user can obtain, allowing users with contributor-level access to read all customers' appointment details and to create, modify, and delete bookings.
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Analysis
by VulDB Data Team • 07/30/2026
The Easy Appointments WordPress plugin version 3.12.26 and earlier contains a critical authorization vulnerability that stems from insufficient capability checks within its appointment management functionality. This flaw allows authenticated users with contributor-level permissions to bypass proper access controls and execute privileged operations against the plugin's core booking system. The vulnerability exists because the plugin relies exclusively on nonce validation for security rather than implementing proper user role verification, creating a path for privilege escalation through what should be restricted administrative functions.
The technical implementation of this vulnerability occurs within the plugin's appointment management actions where capability checks are entirely absent or improperly implemented. Any authenticated user, regardless of their actual role permissions, can obtain valid nonces and subsequently perform operations such as reading all customer appointment details, creating new bookings, modifying existing appointments, and deleting booking records. This represents a fundamental breakdown in the principle of least privilege where the system fails to verify whether the requesting user possesses adequate permissions for the requested operation beyond basic authentication.
The operational impact of this vulnerability extends beyond simple data exposure to encompass full manipulation capabilities over the appointment booking system. Contributors who should only have limited publishing rights gain unrestricted access to customer information and can alter or remove bookings that may contain sensitive personal data, appointment schedules, and service details. This creates significant risks for businesses relying on the plugin for appointment management, potentially exposing customer privacy and disrupting business operations through unauthorized modifications to booking records.
From a cybersecurity perspective, this vulnerability aligns with CWE-284 (Improper Access Control) and represents a classic case of inadequate authorization checks in web applications. The flaw also maps to ATT&CK technique T1078.004 (Valid Accounts: Cloud Accounts) where attackers can leverage legitimate user accounts with insufficient privileges to gain unauthorized access to sensitive functionality. Organizations using this plugin face risks of data breaches, compliance violations under privacy regulations such as gdpr and hipaa, and potential service disruption through malicious booking modifications that could impact business operations.
The recommended mitigations include immediate plugin updates to versions that implement proper capability checks, implementation of additional security layers such as custom role restrictions for contributor users, and regular security auditing of WordPress plugins for authorization flaws. Administrators should also consider implementing network-level access controls, monitoring for unauthorized booking system access, and ensuring that user roles are properly configured to minimize privilege levels. Organizations should conduct comprehensive vulnerability assessments of their WordPress installations to identify similar authorization flaws in other plugins or custom code implementations that could present analogous security risks.