CVE-2026-81199 MasterStudy CVE debrief

Who should care

Administrators and users of the MasterStudy LMS WordPress Plugin should be aware of this vulnerability and take necessary actions to protect their installations. This includes updating to version 3.7.46 or later, implementing additional security measures, and monitoring for potential exploitation attempts.

Technical summary

The MasterStudy LMS WordPress Plugin before 3.7.46 lacks proper authorization checks when retrieving student learning statistics. Unauthenticated attackers can exploit this vulnerability to access course counts, points, certificates, quiz and assignment totals for any registered user. The vulnerability has a CVSS score of 5.3 and is classified as MEDIUM severity. To mitigate this risk, it is essential to update the plugin to version 3.7.46 or later and implement additional security measures such as monitoring for potential exploitation attempts and ensuring proper access controls are in place. The vulnerability allows for the disclosure of sensitive student learning statistics, which could be used for malicious purposes if accessed by unauthorized parties. Affected organizations should prioritize updating the plugin and review their security configurations to prevent exploitation. Limited additional context is available; further investigation may be required to fully understand the vulnerability's impact. Evidence is based on official CVE and NVD records, as well as a source reference from WPScan. The CVE Program and NIST NVD provide authoritative details on CVE-2026-81199. The NVD entry is currently Deferred, indicating that further analysis or information is required before a final assessment can be made. This vulnerability highlights the importance of robust authorization checks in educational software to protect student data. Organizations using the MasterStudy LMS WordPress Plugin should verify their plugin configuration and ensure that proper access controls are in place to prevent unauthorized access to student learning statistics. Additionally, monitoring for potential exploitation attempts and anomalous activity can help detect and respond to potential security incidents related to this vulnerability. By taking these steps, organizations can reduce the risk associated with CVE-2026-81199 and protect their students' sensitive learning data. It is also recommended to review and update the MasterStudy LMS WordPress Plugin to version 3.7.46 or later, implement additional authentication and authorization checks for retrieving student learning statistics, and

Defensive priority

Medium-priority defensive actions are recommended due to the MEDIUM CVSS score of 5.3 for CVE-2026-81199, which allows unauthenticated attackers to disclose sensitive student learning statistics.

Recommended defensive actions

• Review and update MasterStudy LMS WordPress Plugin to version 3.7.46 or later.
• Implement additional authentication and authorization checks for retrieving student learning statistics.
• Monitor for potential exploitation attempts and anomalous activity.
• Verify plugin configuration and ensure proper access controls are in place.
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance.
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed.

Evidence notes

Evidence is based on official CVE and NVD records, as well as a source reference from WPScan. The CVE Program and NIST NVD provide authoritative details on CVE-2026-81199. Limited additional context is available; further investigation may be required to fully understand the vulnerability's impact.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.