CVE-2025-59575 is a vulnerability identified in the Stylemix MasterStudy Learning Management System (LMS) affecting versions up to and including 3.6.20. The issue allows an attacker with limited privileges (PR:L) and network access (AV:N) to retrieve embedded sensitive system information that should not be accessible to unauthorized control spheres. The vulnerability does not require user interaction (UI:N) and impacts confidentiality (C:L) but does not affect integrity or availability. The vulnerability scope is changed (S:C), meaning the impact crosses security boundaries, potentially exposing sensitive data beyond the initially compromised component. The exposed data could include configuration details, system paths, or other embedded sensitive information that could facilitate further attacks or reconnaissance. Although no known exploits are reported in the wild, the vulnerability's medium CVSS score (5.0) reflects a moderate risk, especially in environments where attackers can gain limited access to the LMS. The lack of official patches or mitigation guidance at the time of publication increases the urgency for organizations to implement compensating controls. The vulnerability arises from insufficient access control or improper data exposure within the LMS application code, allowing unauthorized retrieval of sensitive embedded data. Given the widespread use of MasterStudy LMS in educational and corporate training sectors, this vulnerability poses a tangible risk to confidentiality of system information.

For European organizations, particularly educational institutions and corporate training providers using MasterStudy LMS, this vulnerability could lead to unauthorized disclosure of sensitive system information. Exposure of such data can facilitate further targeted attacks, including privilege escalation, lateral movement, or exploitation of other vulnerabilities. Confidentiality breaches may result in loss of intellectual property, exposure of user data, or compromise of internal infrastructure details. Although the vulnerability does not directly impact system integrity or availability, the information disclosed could be leveraged to mount more damaging attacks. The impact is heightened in regulated sectors where data protection compliance (e.g., GDPR) is critical, potentially leading to legal and reputational consequences. Organizations relying on MasterStudy LMS for critical training or educational delivery may face operational risks if attackers use the disclosed information to disrupt services indirectly. The absence of known exploits reduces immediate risk but does not eliminate the threat, especially as attackers may develop exploits once details become public. The medium severity rating suggests that while not critical, the vulnerability warrants timely attention to prevent escalation.

1. Restrict network access to the MasterStudy LMS instance by implementing strict firewall rules and network segmentation to limit exposure to trusted users only. 2. Enforce the principle of least privilege by reviewing and minimizing user roles and permissions within the LMS to reduce the risk of unauthorized access. 3. Monitor LMS logs and network traffic for unusual access patterns or attempts to retrieve sensitive information. 4. Implement web application firewalls (WAF) with custom rules to detect and block suspicious requests targeting sensitive endpoints. 5. Regularly audit the LMS configuration and source code (if accessible) to identify and remediate improper data exposure. 6. Stay informed about vendor updates and apply patches promptly once available, as no official patch was provided at the time of disclosure. 7. Consider deploying intrusion detection/prevention systems (IDS/IPS) to detect exploitation attempts. 8. Educate LMS administrators about this vulnerability and encourage proactive security hygiene. 9. If feasible, isolate the LMS environment from other critical infrastructure to contain potential breaches. 10. Engage with the vendor or community for any unofficial patches or mitigations until an official fix is released.