CVE-2024-56057
📋 TL;DR
This vulnerability allows attackers to upload arbitrary files, including web shells, to WordPress sites using the WPLMS plugin. It affects all WordPress installations with vulnerable versions of the WPLMS plugin, potentially leading to complete server compromise.
💻 Affected Systems
- WPLMS WordPress Plugin
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete server takeover, data exfiltration, ransomware deployment, and persistent backdoor access.
Likely Case
Web shell upload leading to website defacement, data theft, and further lateral movement within the hosting environment.
If Mitigated
File upload attempts blocked by web application firewall or file type restrictions.
🎯 Exploit Status
Exploitation requires authenticated user access but is trivial once access is obtained.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.9.9.5.2
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find WPLMS plugin. 4. Click 'Update Now' if available. 5. Alternatively, download version 1.9.9.5.2 from WordPress repository and manually update.
🔧 Temporary Workarounds
Disable WPLMS Plugin
allTemporarily deactivate the vulnerable plugin until patching is possible.
wp plugin deactivate wplms
Restrict File Uploads via .htaccess
linuxBlock execution of uploaded files in the uploads directory.
Add to .htaccess in wp-content/uploads: <FilesMatch "\.(php|php5|phtml|pl|py|jsp|asp|sh|cgi)$">
Order Allow,Deny
Deny from all
</FilesMatch>
🧯 If You Can't Patch
- Implement strict file upload validation at web server level.
- Deploy web application firewall with file upload protection rules.
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel > Plugins > Installed Plugins for WPLMS version below 1.9.9.5.2.Check Version:
wp plugin get wplms --field=versionVerify Fix Applied:
Confirm WPLMS plugin version is 1.9.9.5.2 or higher in WordPress admin.📡 Detection & Monitoring
Log Indicators:
- Unusual file uploads to wp-content/uploads directory
- POST requests to WPLMS file upload endpoints with executable extensions
Network Indicators:
- HTTP POST requests with file uploads to WPLMS-specific endpoints
SIEM Query:
source="web_server" AND (uri_path="/wp-content/plugins/wplms/*" AND method="POST" AND file_extension IN ("php", "phtml", "jsp"))