CVE-2026-1925 identifies a missing authorization vulnerability (CWE-862) in the EmailKit – Email Customizer for WooCommerce & WP plugin for WordPress, specifically in the 'update_template_data' function. This function lacks proper capability checks, allowing any authenticated user with at least Subscriber-level privileges to modify the title of any post on the site, including standard posts, pages, and custom post types. The vulnerability affects all plugin versions up to and including 1.6.2. The attack vector is remote network access requiring authentication but no user interaction beyond login. The vulnerability impacts data integrity by enabling unauthorized modification of content titles, which could be leveraged for defacement, misinformation, or social engineering attacks. The CVSS v3.1 score is 4.3 (medium), reflecting low impact on confidentiality and availability but moderate impact on integrity. No known exploits have been reported in the wild, and no official patches have been released as of the publication date. The plugin is commonly used in WooCommerce-powered WordPress sites, which are prevalent in e-commerce environments. The lack of authorization checks indicates a design flaw in access control implementation within the plugin, emphasizing the need for strict capability verification in WordPress plugins handling content modifications.

For European organizations, this vulnerability poses a risk primarily to the integrity of website content. Unauthorized modification of post titles can lead to misinformation, brand damage, and loss of customer trust, especially for e-commerce sites relying on WooCommerce and EmailKit for transactional or marketing emails. While it does not directly expose sensitive data or disrupt service availability, altered content can facilitate phishing or social engineering attacks by misleading users. Organizations with multi-user WordPress environments where lower-privileged users have Subscriber or higher roles are particularly vulnerable. The reputational impact can be significant for businesses in regulated sectors such as finance, healthcare, and retail, where website integrity is critical. Additionally, attackers could use this vulnerability as a foothold for further attacks if combined with other weaknesses. The absence of known exploits reduces immediate risk but does not eliminate the threat, especially as attackers may develop exploits once the vulnerability is publicly known.

To mitigate this vulnerability, European organizations should immediately audit user roles and permissions within their WordPress environments, ensuring that Subscriber-level users are limited and monitored. Restrict plugin access to trusted administrators and editors only. Implement strict role-based access controls and consider disabling or removing the EmailKit plugin if it is not essential. Monitor website content for unauthorized changes, particularly post titles, using file integrity monitoring or content change detection tools. Apply security plugins that can enforce additional authorization checks or alert on suspicious activity. Stay informed about updates from the plugin vendor and apply patches promptly once released. As a temporary workaround, organizations with development resources could implement custom capability checks or filters to restrict access to the 'update_template_data' function. Conduct regular security training for administrators to recognize and respond to potential misuse of user accounts. Finally, maintain comprehensive backups to restore content in case of unauthorized modifications.