CVE-2025-64212 is a security vulnerability identified in the StylemixThemes MasterStudy LMS Pro plugin, specifically affecting versions prior to 4.7.16. The vulnerability arises from missing authorization controls, meaning that the plugin fails to properly enforce access restrictions on certain functionality or data. This misconfiguration allows an attacker to bypass intended access controls, potentially performing actions or accessing information that should be restricted. The issue is categorized as an Incorrectly Configured Access Control vulnerability, which is critical in web applications managing sensitive educational data. MasterStudy LMS Pro is a WordPress-based learning management system plugin used by educational institutions and corporate training providers to manage courses, users, and learning content. Exploitation could lead to unauthorized access to course materials, user data, or administrative functions, undermining confidentiality and integrity. Although no public exploits or patches are currently available, the vulnerability has been officially published and reserved in the CVE database. The lack of a CVSS score indicates that detailed impact metrics are not yet assigned, but the nature of missing authorization typically implies a high risk. Attackers do not require authentication or user interaction to exploit this flaw, increasing its threat level. The vulnerability affects all installations running vulnerable versions, which may be widespread given the popularity of the plugin in the e-learning sector.

For European organizations, especially educational institutions and corporate training providers relying on MasterStudy LMS Pro, this vulnerability poses a significant risk. Unauthorized actors could exploit the missing authorization to access or modify sensitive educational content, user information, or administrative settings. This could lead to data breaches involving personal data of students and staff, violation of GDPR requirements, and disruption of learning services. The integrity of course content and user progress data could be compromised, affecting trust and operational continuity. Additionally, unauthorized administrative access could enable further malicious activities, such as injecting malicious code or altering system configurations. The impact extends beyond confidentiality to integrity and availability, potentially causing reputational damage and financial penalties under European data protection laws. Organizations with large deployments or those integrated with other critical systems face amplified risks.

Organizations should prioritize upgrading MasterStudy LMS Pro to version 4.7.16 or later once the patch is released by StylemixThemes. Until a patch is available, administrators should audit and tighten access control settings within the LMS, restricting permissions to the minimum necessary. Implementing Web Application Firewalls (WAFs) with custom rules to detect and block suspicious requests targeting LMS endpoints can provide interim protection. Regularly monitoring logs for unusual access patterns or privilege escalations is critical. Conducting internal penetration testing focused on access control mechanisms can help identify exploitation attempts. Additionally, organizations should ensure that all WordPress installations and plugins are kept up to date and that backups are maintained to enable recovery in case of compromise. Educating LMS administrators about this vulnerability and enforcing strict user role management will reduce exposure. Finally, organizations should subscribe to vendor advisories and threat intelligence feeds to respond promptly to new developments.