What the vulnerability does
01Description
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.
Explanation of Vulnerability in Simple Terms
02Summary
The MasterStudy LMS WordPress plugin through version 3.7.11 contains a stored cross-site scripting (XSS) vulnerability. An authenticated user with low privileges can inject malicious scripts that execute in the browsers of other users, including administrators. The vulnerability affects the plugin's scope across the site, potentially compromising user sessions and data.
What an attacker can do
03Attacker Capabilities
Inject malicious scripts that run in other users' browsers, stealing sessions or modifying site content.
Potential impact on your site
04Site Impact
Any logged-in user can inject code that affects administrators and other users, risking account takeover and data theft.
Conditions required to exploit
05Prerequisites
Attacker must have a low-privilege account on the WordPress site; no user interaction required.
Key dates
06Disclosure timeline
February 14, 2026
CVE published
April 8, 2026
Record updated
