MasterStudy LMS WordPress Plugin – for Online Courses and Education, CVE-2026-0559

CVE, Research URL: CVE-2026-0559
Home page URL: Security reports for MasterStudy LMS WordPress Plugin – for Online Courses and Education
Application: MasterStudy LMS WordPress Plugin – for Online Courses and Education
Published on: Feb 14, 2026
Research Description: The MasterStudy LMS WordPress Plugin – for Online Courses and Education plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's 'stm_lms_courses_grid_display' shortcode in all versions up to, and including, 3.7.11 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers, with contributor level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
Affected versions: max 3.7.12.
Status: vulnerable