CVE-2025-64366 is a Blind SQL Injection vulnerability affecting the Stylemix MasterStudy LMS WordPress plugin, specifically versions up to 3.6.27. The vulnerability arises from improper neutralization of special elements in SQL commands, allowing attackers to craft malicious input that alters the intended SQL query logic. Blind SQL Injection means attackers cannot directly see the database output but can infer data through timing or boolean responses, making exploitation stealthy but still impactful. The plugin is widely used in educational environments to manage courses and learning content, often integrated into WordPress sites. The lack of a CVSS score indicates this is a newly published vulnerability with limited public exploit information. However, SQL Injection vulnerabilities are generally critical due to their potential to compromise confidentiality, integrity, and availability of backend databases. Exploitation typically requires sending crafted HTTP requests to vulnerable endpoints, which may not require authentication depending on the plugin's configuration. No patches or exploit code are currently publicly available, but the vulnerability is officially published and should be considered a priority for remediation. The vulnerability's impact includes unauthorized data extraction, data modification, or even full database compromise, which could lead to data breaches or service disruption in LMS environments.

For European organizations, the impact of CVE-2025-64366 can be significant, especially those relying on MasterStudy LMS for critical training, compliance, or educational services. Successful exploitation could lead to unauthorized access to sensitive user data, including personal information of students and staff, course content, and organizational data. Data integrity could be compromised, allowing attackers to alter grades, course materials, or user roles, potentially disrupting educational processes. Availability could also be affected if attackers execute destructive SQL commands. The reputational damage and regulatory consequences under GDPR for data breaches could be severe. Organizations with large deployments of WordPress-based LMS solutions are particularly at risk. The absence of known exploits in the wild currently reduces immediate risk but does not eliminate the threat, as attackers often develop exploits rapidly after disclosure. The vulnerability's presence in a widely used LMS plugin increases the attack surface for European educational institutions and corporate training providers.

1. Monitor Stylemix vendor communications and apply official patches or updates for MasterStudy LMS as soon as they are released. 2. In the absence of patches, implement Web Application Firewalls (WAFs) with rules specifically designed to detect and block SQL Injection attempts targeting WordPress plugins. 3. Conduct thorough input validation and sanitization on all user inputs interacting with the LMS, especially those that influence database queries. 4. Restrict database user permissions to the minimum necessary for LMS operation to limit the impact of any successful injection. 5. Regularly audit and monitor LMS logs for unusual query patterns or repeated failed requests that may indicate exploitation attempts. 6. Educate administrators and developers on secure coding practices and the risks of SQL Injection vulnerabilities. 7. Consider isolating the LMS environment within segmented network zones to limit lateral movement in case of compromise. 8. Perform vulnerability scanning and penetration testing focused on the LMS to identify and remediate similar injection flaws proactively.