CVE-2025-63063 identifies a missing authorization vulnerability in the Yandex Metrika WordPress plugin (Yandex.Metrica) up to version 1.2.2. The vulnerability arises from incorrectly configured access control security levels, allowing unauthorized users to bypass authorization checks. This means that attackers can potentially access or manipulate analytics data or configurations without proper credentials. Yandex Metrika is a web analytics tool widely used to track website traffic and user behavior, and the WordPress plugin integrates this service into websites. The lack of authorization checks could expose sensitive data such as visitor statistics, user behavior patterns, and possibly administrative functions related to the analytics setup. Although no public exploits have been reported yet, the vulnerability's nature makes it a significant risk, especially for websites relying heavily on this plugin for business intelligence or marketing decisions. The vulnerability was reserved in October 2025 and published in December 2025, but no CVSS score has been assigned yet. The absence of authentication requirements and the direct impact on confidentiality and integrity elevate the threat level. The plugin's usage is more prevalent in Russian-speaking countries and some European regions, making organizations in these areas more susceptible. The vulnerability underscores the importance of proper access control implementation in third-party plugins integrated into critical web infrastructure.

For European organizations, this vulnerability could lead to unauthorized disclosure of sensitive web analytics data, which may include user behavior, traffic sources, and conversion metrics. Such data leakage can harm competitive positioning and violate privacy regulations like GDPR if personal data is indirectly exposed. Additionally, attackers could manipulate analytics configurations, skewing data integrity and misleading business decisions. The lack of authorization could also enable attackers to perform further attacks by leveraging insights gained from analytics data. Organizations relying on Yandex Metrika for marketing, e-commerce, or customer insights may face operational disruptions and reputational damage. The impact is heightened for entities with strict compliance requirements or those operating in sectors where data confidentiality is paramount. Since the vulnerability affects a widely used plugin, the attack surface is broad, potentially impacting numerous websites across Europe, especially in countries with higher adoption of Yandex services. Although no exploits are currently known, the ease of exploitation due to missing authorization and no authentication requirements increases the risk of future attacks.

1. Monitor official Yandex Metrika and WordPress plugin repositories for patches addressing CVE-2025-63063 and apply updates immediately upon release. 2. Until patches are available, restrict access to the plugin’s administrative interfaces using web application firewalls (WAFs) or IP whitelisting to limit exposure. 3. Conduct thorough audits of user roles and permissions within WordPress to ensure only trusted administrators have access to analytics configurations. 4. Implement network segmentation to isolate web analytics components from critical internal systems. 5. Enable detailed logging and monitoring of plugin-related activities to detect unauthorized access attempts promptly. 6. Consider temporarily disabling the Yandex Metrika plugin if it is not essential or if risk tolerance is low. 7. Educate web administrators about the risks of missing authorization vulnerabilities and encourage best practices in plugin management. 8. Review privacy policies and data handling procedures to ensure compliance with GDPR and other relevant regulations in case of data exposure. 9. Use security scanners to identify other potential misconfigurations or vulnerabilities in third-party plugins integrated into web infrastructure.