CVE-2025-14028 is a stored Cross-Site Scripting (XSS) vulnerability identified in the Contact Us Simple Form plugin for WordPress, developed by bruterdregz. This vulnerability exists in all versions up to and including 1.0 due to insufficient sanitization and escaping of user-supplied input within the plugin's admin settings interface. Specifically, authenticated users with administrator-level privileges or higher can inject arbitrary JavaScript code into pages generated by the plugin. When other users access these pages, the injected scripts execute in their browsers, potentially leading to session hijacking, privilege escalation, or other malicious actions. The vulnerability is classified under CWE-79, indicating improper neutralization of input during web page generation. The CVSS 3.1 base score is 4.4 (medium severity), reflecting that the attack vector is network-based, requires high attack complexity, and privileges at the administrator level, with no user interaction needed. The scope is changed, meaning the vulnerability affects components beyond the initially vulnerable component, and the impact is limited to low confidentiality and integrity loss without affecting availability. No known exploits have been reported in the wild, and no official patches have been released at the time of publication. The vulnerability's exploitation requires authenticated admin access, which limits the attack surface but still poses a significant risk if admin credentials are compromised or misused. The plugin's widespread use in WordPress sites, especially small and medium enterprises, increases the potential impact if exploited.

For European organizations, this vulnerability poses a moderate risk primarily to websites using the Contact Us Simple Form plugin on WordPress. Exploitation could allow attackers with admin access to inject malicious scripts, potentially leading to session hijacking, unauthorized actions on behalf of users, or defacement. This can undermine user trust, lead to data leakage, and damage organizational reputation. Since the vulnerability requires administrator privileges, the main risk vector is compromised or malicious insiders. The impact on confidentiality and integrity is low to moderate, but availability is not affected. Organizations relying on WordPress for customer interaction or e-commerce may face business disruption and regulatory scrutiny if personal data is exposed. Given the GDPR environment in Europe, any data compromise could lead to significant compliance penalties. The absence of known exploits reduces immediate risk, but the vulnerability remains a latent threat, especially in environments with weak admin credential management or insufficient monitoring.

European organizations should implement the following specific mitigations: 1) Restrict administrator access strictly to trusted personnel and enforce strong authentication mechanisms such as multi-factor authentication (MFA). 2) Regularly audit admin accounts and permissions to detect unauthorized privilege escalations or suspicious activity. 3) Monitor WordPress plugin updates closely and apply patches promptly once available for the Contact Us Simple Form plugin. 4) Employ Web Application Firewalls (WAFs) with custom rules to detect and block suspicious script injections in admin pages. 5) Conduct input validation and output encoding reviews for all custom plugins or themes to prevent similar XSS issues. 6) Educate administrators on the risks of XSS and safe handling of plugin settings. 7) Consider isolating or replacing the vulnerable plugin with more secure alternatives if immediate patching is not possible. 8) Implement security monitoring and logging to detect anomalous behavior indicative of exploitation attempts.