CVE-2025-13142 is a medium-severity CSRF vulnerability identified in the farvehandleren Custom Post Type plugin for WordPress, affecting all versions up to and including 1.0. The vulnerability stems from the absence of nonce validation on the custom post type deletion endpoint, which is a security mechanism designed to prevent unauthorized or forged requests. Without this validation, an attacker can craft a malicious request that, if executed by an authenticated administrator (e.g., by clicking a specially crafted link), will delete custom post types from the WordPress site. This attack vector requires no prior authentication by the attacker but does require user interaction from a privileged user, making it a targeted social engineering risk. The vulnerability impacts the integrity of the website content by allowing unauthorized deletion of custom post types, potentially disrupting site functionality or content management workflows. The CVSS 3.1 base score of 4.3 reflects the network attack vector, low complexity, no privileges required, but requiring user interaction and limited impact to integrity only. No known exploits are currently in the wild, but the vulnerability is publicly disclosed and should be addressed promptly. The plugin's widespread use in WordPress sites, especially those relying on custom post types for content structuring, increases the potential attack surface. The lack of a patch link indicates that either a fix is pending or users must implement manual mitigations. This vulnerability highlights the importance of nonce validation in WordPress plugin development to prevent CSRF attacks.

For European organizations, the primary impact of CVE-2025-13142 is the potential unauthorized deletion of custom post types within WordPress sites, which can disrupt website content management and potentially lead to data loss or operational downtime. While confidentiality and availability are not directly impacted, the integrity breach can affect business reputation, user trust, and content reliability. Organizations relying heavily on WordPress for public-facing websites, e-commerce, or internal portals that utilize the farvehandleren Custom Post Type plugin are at risk. The attack requires social engineering to trick administrators, so organizations with less security awareness or inadequate user training are more vulnerable. Additionally, compromised content management can indirectly affect compliance with European data protection regulations if content integrity is critical to regulatory adherence. The absence of known exploits reduces immediate risk but does not eliminate the threat, especially as attackers may develop exploits following public disclosure. The medium severity suggests that while the threat is not critical, it warrants timely mitigation to prevent targeted attacks.

European organizations should immediately verify if the farvehandleren Custom Post Type plugin is in use on their WordPress sites and identify the version deployed. Since no official patch link is provided, users should implement manual nonce validation on the deletion functionality to ensure requests are legitimate and originate from authorized users. This can be done by adding WordPress nonce checks (e.g., using wp_nonce_field and check_admin_referer functions) in the plugin's code handling deletion. Additionally, organizations should enforce strict administrative access controls and limit the number of users with deletion privileges. User training to recognize phishing and social engineering attempts is critical to reduce the risk of administrators clicking malicious links. Monitoring and logging administrative actions can help detect suspicious deletion activities. If feasible, temporarily disabling the deletion feature or replacing the plugin with a more secure alternative until a patch is available is advisable. Regular backups of WordPress content, including custom post types, should be maintained to enable recovery in case of unauthorized deletions. Finally, organizations should subscribe to vulnerability advisories and update the plugin promptly once an official fix is released.