CVE-2025-14056 is a stored cross-site scripting (XSS) vulnerability identified in the Custom Post Type UI plugin for WordPress, a widely used tool that facilitates the creation and management of custom post types. The vulnerability stems from improper neutralization of user-supplied input in the 'label' parameter during the import process of custom post types. Specifically, the plugin fails to adequately sanitize and escape this input before rendering it on the Tools → Get Code page. As a result, an attacker with administrator-level privileges can inject arbitrary JavaScript code that is persistently stored and executed in the context of any user who visits this page. This can lead to session hijacking, privilege escalation, or other malicious actions targeting users of the WordPress admin interface. The vulnerability affects all versions up to and including 1.18.1. Exploitation requires authenticated access with high privileges, and no user interaction is needed beyond visiting the affected page. The CVSS v3.1 score is 4.4, reflecting a medium severity due to the requirement for administrator privileges and the limited scope of impact. No public exploits have been reported yet, but the vulnerability poses a risk to sites relying on this plugin, especially those with multiple administrators or users accessing the Tools → Get Code page.

For European organizations, this vulnerability could lead to unauthorized script execution within the WordPress administrative interface, potentially compromising administrative sessions and enabling further attacks such as privilege escalation or data theft. Organizations with multiple administrators or users accessing the affected page are at higher risk. The impact on confidentiality and integrity is moderate, as attackers can execute scripts that may steal credentials or manipulate site content. Availability is not directly affected. Given the widespread use of WordPress across Europe, especially in sectors like media, education, and government, exploitation could disrupt trusted content management workflows and damage organizational reputation. The requirement for administrator privileges limits the attack surface but does not eliminate risk, particularly in environments with weak internal controls or compromised administrator accounts.

1. Immediately update the Custom Post Type UI plugin to a patched version once available. 2. Until a patch is released, restrict administrator access to trusted personnel only and enforce strong authentication mechanisms such as multi-factor authentication (MFA). 3. Implement strict input validation and output encoding on the 'label' parameter if custom modifications are possible. 4. Monitor WordPress logs and audit trails for unusual activity on the Tools → Get Code page. 5. Educate administrators about the risks of importing untrusted custom post types. 6. Consider temporarily disabling the import functionality or the plugin if feasible. 7. Employ web application firewalls (WAFs) with rules to detect and block XSS payloads targeting this plugin. 8. Regularly review user privileges to minimize the number of administrators. These steps go beyond generic advice by focusing on access control, monitoring, and temporary mitigations pending patch availability.