CVE-2025-64209
📋 TL;DR
This CVE describes a missing authorization vulnerability in the Masterstudy WordPress theme that allows attackers to access functionality not properly constrained by access control lists. Attackers can perform actions intended only for authorized users. This affects all WordPress sites using Masterstudy theme versions before 4.8.122.
💻 Affected Systems
- StylemixThemes Masterstudy WordPress Theme
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Attackers could gain administrative privileges, modify site content, steal sensitive user data, or install malicious plugins/themes.
Likely Case
Unauthorized users accessing restricted functionality such as modifying course content, user data, or theme settings.
If Mitigated
Proper access controls would prevent unauthorized access, limiting impact to legitimate user actions only.
🎯 Exploit Status
Exploitation requires some WordPress knowledge but is straightforward once vulnerable endpoints are identified.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 4.8.122
Restart Required: No
Instructions:
1. Log into WordPress admin panel
2. Navigate to Appearance > Themes
3. Check Masterstudy theme version
4. If below 4.8.122, update immediately via theme update mechanism
5. Verify update completed successfully
🔧 Temporary Workarounds
Temporary Theme Deactivation
allDeactivate Masterstudy theme and switch to default WordPress theme until patched
wp theme deactivate masterstudy
wp theme activate twentytwentyfour
Access Restriction via .htaccess
linuxRestrict access to Masterstudy theme directories
# Add to .htaccess in wp-content/themes/masterstudy/
Order Deny,Allow
Deny from all
🧯 If You Can't Patch
- Implement strict network access controls to limit who can access WordPress admin interface
- Enable WordPress security plugins with access control features and monitor for unauthorized access attempts
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel under Appearance > Themes for Masterstudy version numberCheck Version:
wp theme list --name=masterstudy --field=versionVerify Fix Applied:
Confirm Masterstudy theme version is 4.8.122 or higher in WordPress admin📡 Detection & Monitoring
Log Indicators:
- Unauthorized access attempts to Masterstudy theme endpoints
- Unusual user role changes or privilege escalations
- Access to admin functions from non-admin users
Network Indicators:
- HTTP requests to Masterstudy-specific endpoints from unauthorized IPs
- Unusual pattern of POST requests to theme administration endpoints
SIEM Query:
source="wordpress.log" AND ("masterstudy" OR "theme-admin") AND (status=403 OR user_role!="administrator")