CVE-2026-81338: Unknown Masterstudy Lms WordPress Plugin

Medium severity, CVSS 4.6. EPSS: 0.1% chance of exploitation in the next 30 days.

The MasterStudy LMS WordPress Plugin WordPress plugin before 3.7.50 does not properly sanitise and restrict HTML in user-submitted content before storing it and rendering it to other users, allowing users with subscriber-level accounts and above to perform stored HTML injection, such as embedding iframes, that can be leveraged for phishing and content spoofing against other users viewing the content.

Affected products

• Unknown Masterstudy Lms WordPress Plugin: before 3.7.50 (fixed in 3.7.50)

Published 2026-09-23. Last modified 2026-09-23.