What the vulnerability does
01Description
Missing Authorization vulnerability in StylemixThemes MasterStudy LMS Pro masterstudy-lms-learning-management-system-pro allows Accessing Functionality Not Properly Constrained by ACLs.This issue affects MasterStudy LMS Pro: from n/a through < 4.7.16.
Explanation of Vulnerability in Simple Terms
02Summary
MasterStudy LMS Pro versions up to 4.7.16 lack proper authorization checks, allowing unauthenticated attackers to disrupt the service. The vulnerability does not expose data or allow modification, but an attacker can make the site unavailable to legitimate users without needing credentials or user interaction.
What an attacker can do
03Attacker Capabilities
Make the site unavailable to legitimate users without authentication.
Potential impact on your site
04Site Impact
Your LMS site can be taken offline by an unauthenticated attacker, disrupting access for students and instructors.
Conditions required to exploit
05Prerequisites
Network access only; no credentials or user interaction required.
Key dates
06Disclosure timeline
December 18, 2025
CVE published
April 28, 2026
Record updated