CVE-2025-64213 identifies a vulnerability in the MasterStudy LMS Pro plugin by StylemixThemes, affecting versions prior to 4.7.16. The issue involves the insertion of sensitive information into data sent by the LMS, allowing attackers to retrieve embedded confidential data. This vulnerability likely stems from improper handling or sanitization of sensitive data before transmission, potentially exposing user credentials, personal information, or educational records. The vulnerability does not require authentication or user interaction, making it easier for attackers to exploit remotely. Although no public exploits have been reported, the flaw presents a significant risk to the confidentiality of data managed by the LMS platform. MasterStudy LMS Pro is a widely used WordPress-based learning management system, popular among educational institutions and corporate training environments. The lack of a CVSS score suggests the vulnerability is newly disclosed, but the nature of the flaw indicates a high risk of data leakage. The vulnerability's exploitation could lead to unauthorized data access, violating privacy regulations and damaging organizational reputation. The absence of patch links implies that fixes may be pending or recently released, emphasizing the need for vigilance and timely updates.

For European organizations, the primary impact of CVE-2025-64213 is the potential unauthorized disclosure of sensitive educational and personal data managed within MasterStudy LMS Pro. This can lead to breaches of GDPR and other data protection laws, resulting in legal penalties and loss of trust. Educational institutions, training providers, and enterprises relying on this LMS for confidential data exchange are at risk of data leakage, which could include student records, employee information, and proprietary training content. The vulnerability's ease of exploitation without authentication increases the attack surface, potentially allowing external threat actors to access sensitive information remotely. This could also facilitate further attacks such as phishing or social engineering based on the exposed data. Operationally, organizations may face disruption if they need to take systems offline to remediate or investigate breaches. The reputational damage and compliance risks are particularly significant in Europe, where data privacy regulations are stringent. Additionally, the vulnerability could be leveraged in targeted attacks against strategic sectors such as education, government training programs, and corporate learning environments.

Organizations should immediately inventory their use of MasterStudy LMS Pro and identify affected versions prior to 4.7.16. They must apply security patches as soon as they become available from StylemixThemes or trusted sources. In the absence of patches, consider temporarily disabling the affected LMS plugin or restricting access to the LMS environment to trusted networks only. Conduct thorough audits of data transmission processes within the LMS to ensure sensitive information is not unnecessarily embedded or exposed. Implement network-level protections such as Web Application Firewalls (WAFs) with custom rules to detect and block suspicious data exfiltration attempts. Enhance monitoring and logging around LMS data flows to detect anomalous access patterns. Educate administrators and users about the risks of data exposure and enforce strict access controls and least privilege principles. Regularly review and update incident response plans to include scenarios involving LMS data breaches. Finally, maintain compliance with GDPR by documenting mitigation efforts and preparing for potential breach notifications if exploitation is suspected.