CVE-2026-81198 MasterStudy CVE debrief

Who should care

Users of MasterStudy LMS WordPress Plugin versions before 3.7.46, particularly those with instructor roles, should be aware of this vulnerability and take steps to mitigate it. Affected operators should review their deployments, assess potential impact, and prioritize remediation. Platform administrators should verify affected product deployments and assign owners for follow-up. Vulnerability management and security teams should track exceptions, retest remediated assets, and close items only after evidence is documented.

Technical summary

The MasterStudy LMS WordPress Plugin before 3.7.46 does not properly verify ownership of a curriculum object before acting on it, allowing authenticated users with the instructor role to delete or modify curriculum sections and materials belonging to courses owned by other instructors. This issue has a CVSS score of 3.8 and a CVSS severity of LOW. The vulnerability affects users of MasterStudy LMS WordPress Plugin versions before 3.7.46, particularly those with instructor roles.

Defensive priority

Authenticated users with instructor role can modify or delete curriculum sections and materials of other instructors due to improper ownership verification.

Recommended defensive actions

• Verify ownership verification for curriculum objects in MasterStudy LMS WordPress Plugin versions before 3.7.46.
• Restrict instructor role permissions to prevent unauthorized modifications.
• Monitor for suspicious activity on curriculum sections and materials.
• Update MasterStudy LMS WordPress Plugin to version 3.7.46 or later.
• Implement additional access controls to prevent unauthorized access.
• Review compensating controls for exposed systems while remediation is scheduled and verified.
• Track exceptions, retest remediated assets, and close the item only after evidence is documented.

Evidence notes

The CVE record and NVD entry provide details on the vulnerability in MasterStudy LMS WordPress Plugin before 3.7.46. Limited information is available from the CVE Program and NIST NVD. The vulnerability allows authenticated users with instructor roles to delete or modify curriculum sections and materials belonging to courses owned by other instructors due to improper ownership verification. Defenders should verify affected product deployments, review official advisories, and plan vendor-supported updates or mitigations. They should also monitor for suspicious activity and implement additional access controls.

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.