CVE-2024-33939
📋 TL;DR
This vulnerability allows unauthenticated attackers to access course progress data in Masteriyo LMS WordPress plugin without proper authentication. It affects all WordPress sites running Masteriyo LMS plugin versions up to and including 1.7.3. Attackers can view user course progress information they shouldn't have access to.
💻 Affected Systems
- Masteriyo - LMS WordPress Plugin
📦 What is this software?
Masteriyo by Themegrill
⚠️ Risk & Real-World Impact
Worst Case
Attackers could access sensitive course progress data for all users, potentially exposing learning patterns, completion status, and user activity across all courses.
Likely Case
Unauthenticated users accessing course progress information for various users, potentially exposing learning progress and completion data.
If Mitigated
Limited exposure of non-sensitive course metadata or partial progress information if proper access controls are partially implemented.
🎯 Exploit Status
Authentication bypass vulnerabilities are often easy to exploit once discovered. The vulnerability allows unauthenticated access, making exploitation straightforward.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.7.4 or later
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins → Installed Plugins. 3. Find 'Masteriyo - LMS'. 4. Click 'Update Now' if update is available. 5. Alternatively, download version 1.7.4+ from WordPress.org and manually update.
🔧 Temporary Workarounds
Temporary Plugin Deactivation
allDisable the Masteriyo LMS plugin until patched
wp plugin deactivate masteriyo-lms
Access Restriction via .htaccess
linuxRestrict access to Masteriyo plugin directories
Add 'Deny from all' to .htaccess in /wp-content/plugins/masteriyo-lms/
🧯 If You Can't Patch
- Implement web application firewall (WAF) rules to block unauthorized access to Masteriyo API endpoints
- Monitor access logs for unusual patterns of unauthenticated requests to Masteriyo endpoints
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel → Plugins → Masteriyo - LMS → Version. If version is 1.7.3 or lower, you are vulnerable.Check Version:
wp plugin get masteriyo-lms --field=versionVerify Fix Applied:
After updating, verify plugin version shows 1.7.4 or higher in WordPress admin panel.📡 Detection & Monitoring
Log Indicators:
- Unusual unauthenticated requests to /wp-json/masteriyo/ endpoints
- Multiple 200 responses to course progress API calls from unauthenticated IPs
Network Indicators:
- Unusual traffic patterns to Masteriyo REST API endpoints from external IPs without authentication headers
SIEM Query:
source="web_access_logs" AND uri="/wp-json/masteriyo/*" AND status=200 AND NOT (user_agent="*bot*" OR user_agent="*crawl*")