The vulnerability identified as CVE-2025-11237 affects the Make Email Customizer for WooCommerce WordPress plugin versions through 1.0.6. The core issue is a missing authorization check (CWE-862) in the plugin's AJAX actions, which handle requests to update email customization settings. Because the plugin does not properly verify the privileges of the requesting user, any authenticated user—even those with minimal permissions such as Subscribers—can invoke these AJAX endpoints to modify arbitrary WordPress options. This lack of validation and authorization means that an attacker with a low-privilege account can escalate their influence by changing site-wide configurations, potentially altering email templates, injecting malicious content, or disrupting site functionality. The vulnerability does not require user interaction beyond authentication, and no public exploits have been reported yet. The absence of a CVSS score indicates that the vulnerability is newly published and not yet fully assessed, but the technical details suggest a significant risk due to the broad scope of affected options and the ease of exploitation. The plugin is used in WooCommerce environments, which are common in e-commerce websites, making this a critical concern for online retailers relying on WordPress.

For European organizations, the impact of this vulnerability can be substantial. Unauthorized modification of WordPress options can lead to compromised site integrity, unauthorized data exposure, or disruption of e-commerce operations. Attackers could alter email templates to conduct phishing campaigns targeting customers or employees, inject malicious scripts, or disable critical site functions. This can result in reputational damage, financial loss, and regulatory non-compliance, especially under GDPR if customer data is exposed or manipulated. Organizations with large user bases and multiple low-privilege accounts are particularly vulnerable, as attackers can exploit these accounts to escalate privileges indirectly. The disruption of e-commerce services can also affect revenue streams and customer trust. Given the widespread use of WooCommerce in Europe, the vulnerability poses a tangible threat to many online businesses.

Immediate mitigation steps include restricting user roles to minimize the number of authenticated users with low privileges who can access the plugin's AJAX endpoints. Administrators should audit user permissions and remove unnecessary Subscriber or low-privilege accounts. Until an official patch is released, consider disabling or uninstalling the Make Email Customizer plugin if it is not essential. Implement Web Application Firewall (WAF) rules to monitor and block suspicious AJAX requests targeting the plugin's endpoints. Additionally, monitor WordPress option changes for unusual activity and enable logging to detect potential exploitation attempts. Once a patch becomes available, apply it promptly. Organizations should also educate users about the risks of unauthorized access and enforce strong authentication mechanisms to reduce the risk of account compromise.