CVE-2025-66163 identifies a missing authorization vulnerability in the merkulove Masker for Elementor plugin, a WordPress plugin used to enhance Elementor page builder functionality. The vulnerability arises from incorrectly configured access control security levels, allowing attackers to bypass authorization checks. This means that unauthorized users could perform actions or access resources that should be restricted, potentially leading to unauthorized content changes, data leakage, or privilege escalation within the WordPress environment. The affected versions include all releases up to and including version 1.1.4. The vulnerability was reserved in November 2025 and published in December 2025, with no CVSS score assigned yet and no known exploits reported in the wild. The lack of authentication requirements for exploitation and the nature of the plugin’s integration with WordPress sites increase the risk profile. Since Masker for Elementor is a third-party plugin, the security posture of the entire WordPress site depends on its proper configuration and patching. The vulnerability highlights the importance of rigorous access control implementation in plugin development and deployment.

For European organizations, this vulnerability could lead to unauthorized modification of website content, defacement, or exposure of sensitive data managed through WordPress sites using the Masker for Elementor plugin. This could damage organizational reputation, disrupt business operations, and potentially expose customer or internal data. Attackers exploiting this flaw might gain footholds to launch further attacks, including phishing or malware distribution via compromised websites. The impact is particularly significant for sectors relying heavily on web presence and customer interaction, such as e-commerce, media, and public services. Additionally, regulatory compliance risks arise if personal data is exposed, potentially leading to GDPR violations and associated fines. The lack of authentication requirement for exploitation increases the attack surface, making it easier for remote attackers to target vulnerable sites across Europe.

Organizations should immediately inventory their WordPress installations to identify the presence of the Masker for Elementor plugin and verify the version in use. Until an official patch is released, restrict access to WordPress administrative interfaces and plugin management areas using network-level controls such as IP whitelisting or VPN access. Implement strict role-based access controls within WordPress to limit plugin management capabilities to trusted administrators. Monitor web server and application logs for unusual access patterns or unauthorized attempts to modify plugin-related resources. Employ web application firewalls (WAFs) with custom rules to detect and block suspicious requests targeting the plugin’s endpoints. Once the vendor releases a patch, prioritize its deployment across all affected systems. Additionally, conduct regular security audits of WordPress plugins and maintain an updated inventory to reduce exposure to similar vulnerabilities.