CVE-2025-53572 is a high-severity vulnerability classified under CWE-502, which pertains to the deserialization of untrusted data. This vulnerability affects the WordPress plugin WP Easy Contact developed by emarket-design, specifically versions up to and including 4.0.1. The core issue involves insecure deserialization, where the plugin processes serialized data without proper validation or sanitization. This flaw allows an attacker to perform object injection attacks by crafting malicious serialized payloads that, when deserialized by the plugin, can lead to arbitrary code execution or manipulation of application logic. The CVSS v3.1 base score of 8.1 reflects the critical nature of this vulnerability, with the vector indicating network attack vector (AV:N), high attack complexity (AC:H), no privileges required (PR:N), no user interaction needed (UI:N), unchanged scope (S:U), and high impacts on confidentiality, integrity, and availability (C:H/I:H/A:H). Although no known exploits are currently reported in the wild, the vulnerability's characteristics make it a significant risk, especially given the widespread use of WordPress plugins and the potential for automated exploitation once a proof-of-concept becomes available. The lack of a patch link suggests that a fix may not yet be publicly available, increasing the urgency for mitigation.

For European organizations, the impact of this vulnerability can be substantial. WP Easy Contact is a plugin used to manage contact forms on WordPress websites, which are common across many sectors including e-commerce, government, education, and SMEs. Exploitation could lead to full system compromise of the affected web server, resulting in data breaches involving personal data protected under GDPR, defacement of websites, disruption of services, or use of compromised servers as pivot points for further attacks within corporate networks. The high confidentiality impact means sensitive customer or internal data could be exposed, while integrity and availability impacts could disrupt business operations and damage organizational reputation. Given the strict regulatory environment in Europe, such breaches could also lead to significant legal and financial penalties. The network-based attack vector and no requirement for authentication or user interaction make this vulnerability particularly dangerous for publicly accessible websites.

Immediate mitigation steps include disabling or uninstalling the WP Easy Contact plugin until a vendor patch is released. Organizations should monitor official emarket-design channels and trusted vulnerability databases for patch announcements. In the interim, applying Web Application Firewall (WAF) rules to detect and block suspicious serialized payloads targeting the plugin's endpoints can reduce risk. Conduct thorough audits of WordPress installations to identify the presence of WP Easy Contact and assess exposure. Employ strict input validation and sanitization where possible, and restrict access to administrative interfaces via IP whitelisting or VPNs. Regular backups of affected systems should be maintained to enable rapid recovery. Additionally, organizations should implement network segmentation to limit the impact of potential compromises and monitor logs for unusual activity indicative of exploitation attempts.