CVE-2026-57632 in Email Marketing for WooCommerce Plugin
Summary
by MITRE • 06/26/2026
Subscriber Broken Access Control in Email Marketing for WooCommerce by Omnisend <= 1.19.0 versions.
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Analysis
by VulDB Data Team • 06/26/2026
This vulnerability represents a critical broken access control flaw that affects the Email Marketing for WooCommerce plugin developed by Omnisend, specifically impacting versions up to and including 1.19.0. The issue stems from insufficient authorization checks within the plugin's administrative interfaces, allowing unauthenticated users or subscribers with minimal privileges to access restricted administrative functions and sensitive data. This weakness directly violates the principle of least privilege and demonstrates a fundamental failure in the plugin's permission model implementation. The vulnerability creates an attack surface where malicious actors can exploit the lack of proper access controls to escalate their privileges and gain unauthorized access to critical system functionalities.
The technical root cause of this vulnerability lies in the plugin's failure to properly validate user permissions before executing administrative operations. When users attempt to access certain endpoints or perform specific actions within the plugin's admin interface, the code does not adequately verify whether the requesting user possesses the necessary authorization levels. This flaw typically manifests through improper session management, missing capability checks, or inadequate role-based access controls that should prevent non-administrative users from accessing sensitive administrative features. The vulnerability can be exploited through various vectors including direct API calls, parameter manipulation, or by leveraging existing user sessions to access restricted functionality.
The operational impact of this vulnerability extends beyond simple data exposure, as it enables attackers to potentially compromise the entire WordPress installation and underlying e-commerce platform. An attacker who successfully exploits this vulnerability could gain access to customer databases, order information, payment details, and administrative controls for the email marketing system. This access could lead to data breaches, unauthorized modifications to marketing campaigns, potential injection of malicious content, and complete takeover of the plugin's administrative functions. The vulnerability also poses significant risks to business continuity and customer trust, as it could enable attackers to disrupt email marketing operations or exfiltrate sensitive customer information.
Mitigation strategies for this vulnerability should prioritize immediate patching of affected systems to version 1.19.1 or later, which contains the necessary access control fixes. Administrators should also implement additional security measures including regular security audits of plugin installations, monitoring for unauthorized administrative access attempts, and implementing network-level restrictions on administrative interfaces. The remediation process should involve thorough code review to ensure proper capability checks are implemented throughout the plugin's administrative components. Organizations should also consider implementing web application firewalls and intrusion detection systems to monitor for exploitation attempts. This vulnerability aligns with CWE-285 which addresses improper authorization in software systems, and represents a clear violation of ATT&CK technique T1078 for valid accounts and privilege escalation. The issue underscores the critical importance of proper access control implementation in web applications and the potential consequences of inadequate security measures in third-party plugins that integrate with critical business systems.