CVE-2026-8789 in Easy Appointments Plugin
Summary
by MITRE • 07/24/2026
The Easy Appointments plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check and missing nonce verification on the `ea_delete_multiple_connections` AJAX action in all versions up to, and including, 3.12.27. This makes it possible for authenticated attackers, with Contributor-level access and above, to delete arbitrary connection records from the `wp_ea_connections` table, disrupting the plugin's core booking functionality.
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Analysis
by VulDB Data Team • 07/24/2026
The Easy Appointments WordPress plugin presents a critical security vulnerability that stems from insufficient access controls and validation mechanisms within its AJAX handling system. This weakness affects all versions up to and including 31227 and specifically targets the `ea_delete_multiple_connections` endpoint which lacks proper capability verification and nonce authentication checks. The vulnerability creates a pathway for authenticated attackers who possess Contributor-level privileges or higher to exploit the plugin's backend functionality without appropriate authorization.
The technical flaw resides in the absence of capability validation before executing the delete operation on connection records stored in the WordPress database. The `wp_ea_connections` table serves as the core repository for booking system relationships and dependencies, making unauthorized modifications particularly dangerous. Without proper nonce verification, attackers can craft malicious requests that bypass standard WordPress security protocols designed to prevent cross-site request forgery attacks. This absence of cryptographic token validation means that any authenticated user with sufficient privileges can manipulate the plugin's data integrity through carefully constructed AJAX calls.
The operational impact of this vulnerability extends beyond simple data deletion, as it fundamentally compromises the plugin's booking system functionality and business operations. When connection records are removed from the `wp_ea_connections` table, the plugin loses critical relationship mappings that connect appointments with service providers, resources, and customer information. This disruption can lead to cascading failures where bookings become orphaned, scheduling conflicts arise, and the entire appointment management workflow becomes compromised. The attacker's ability to delete arbitrary records means they could systematically dismantle the booking infrastructure, potentially affecting multiple services and customer interactions.
From a cybersecurity perspective, this vulnerability aligns with CWE-863, which addresses "Incorrect Authorization," and represents a clear violation of the principle of least privilege in access control systems. The issue also maps to ATT&CK technique T1078.004, which covers legitimate credentials usage for persistence and privilege escalation within application environments. Organizations using this plugin face significant risk as attackers with Contributor-level access can exploit this weakness without requiring additional privileges or complex attack vectors. The vulnerability demonstrates poor security implementation practices where fundamental authentication and authorization checks are omitted from critical data manipulation endpoints.
Mitigation strategies should include immediate patching to version 31228 or later where the capability and nonce validation has been implemented. Administrators must also review user roles and permissions, ensuring that only trusted users possess Contributor-level access or higher. Additional security measures such as implementing Web Application Firewalls, monitoring for suspicious AJAX requests, and conducting regular security audits of plugin components will help detect and prevent exploitation attempts. The vulnerability underscores the importance of proper input validation and access control implementation in web applications, particularly those handling sensitive business data and user information.