CVE-2025-64282 identifies an authorization bypass vulnerability in the Radius Blocks plugin developed by RadiusTheme, specifically affecting versions up to 2.2.1. The root cause is an incorrect implementation of access control security levels, categorized under CWE-639 (Authorization Bypass Through User-Controlled Key). This vulnerability allows an attacker with low privileges (PR:L) and network access (AV:N) to exploit user-controlled keys to bypass authorization checks without requiring user interaction (UI:N). The bypass enables unauthorized access to certain functionalities or data that should be restricted, impacting confidentiality (C:L) but not integrity or availability. The plugin is commonly used in WordPress environments to add block-based features, and improper access control can lead to exposure of sensitive information or unauthorized actions within the affected web applications. Although no exploits are currently known in the wild, the vulnerability's presence in a widely used plugin necessitates attention. The CVSS 3.1 vector indicates the attack surface is remote and relatively easy to exploit due to low complexity and no user interaction. The absence of vendor patches at the time of publication means organizations must rely on configuration reviews and access restrictions until updates are released.

For European organizations, the primary impact of CVE-2025-64282 is unauthorized access to sensitive data or functionalities within web applications using the Radius Blocks plugin. This can lead to confidentiality breaches, potentially exposing user data or internal information. While the vulnerability does not affect data integrity or system availability, unauthorized data exposure can have regulatory consequences under GDPR, including fines and reputational damage. Organizations relying on Radius Blocks for critical web features may face increased risk if attackers leverage this flaw to escalate privileges or gather intelligence for further attacks. The medium severity rating reflects moderate risk but highlights the importance of timely mitigation to prevent exploitation, especially in sectors handling sensitive personal or business data.

1. Immediately audit and review access control configurations within Radius Blocks to ensure that user-controlled keys cannot override authorization checks. 2. Restrict plugin access to trusted users with appropriate privilege levels, minimizing exposure to low-privilege accounts. 3. Monitor network traffic and logs for unusual access patterns that may indicate attempts to exploit authorization bypass. 4. Apply vendor patches or updates as soon as they become available to address the vulnerability directly. 5. Employ web application firewalls (WAFs) with custom rules to detect and block suspicious requests targeting Radius Blocks endpoints. 6. Conduct regular security assessments and penetration tests focusing on plugin-related access controls. 7. Educate administrators and developers about secure configuration practices for WordPress plugins to prevent similar issues.