CVE-2024-33913
📋 TL;DR
This CSRF vulnerability in the Xserver Migrator WordPress plugin allows attackers to trick authenticated administrators into uploading arbitrary files, potentially leading to remote code execution. It affects all versions up to 1.6.1. WordPress sites using this vulnerable plugin are at risk.
💻 Affected Systems
- Xserver Migrator WordPress Plugin
⚠️ 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
Complete site compromise via remote code execution, data theft, defacement, or malware distribution.
Likely Case
Unauthorized file upload leading to backdoor installation, privilege escalation, or data manipulation.
If Mitigated
Limited impact if CSRF protections are implemented and file upload restrictions are enforced.
🎯 Exploit Status
Exploitation requires social engineering to trick an admin, but the technical execution is straightforward once the admin is compromised.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.6.2 or later
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Go to Plugins > Installed Plugins. 3. Find Xserver Migrator and update to version 1.6.2 or later. 4. If update not available, deactivate and delete the plugin immediately.
🔧 Temporary Workarounds
Implement CSRF Tokens
allAdd CSRF protection to file upload endpoints if custom code modifications are possible.
Restrict File Uploads
linuxConfigure web server or application to block uploads of executable files (e.g., .php, .exe).
# Apache: Add to .htaccess
<FilesMatch "\.(php|exe|phtml)$">
Order Allow,Deny
Deny from all
</FilesMatch>
# Nginx: Add to server block
location ~ \.(php|exe|phtml)$ {
deny all;
}
🧯 If You Can't Patch
- Deactivate and remove the Xserver Migrator plugin immediately.
- Implement strict web application firewall (WAF) rules to block suspicious file uploads and CSRF attempts.
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel > Plugins > Installed Plugins for Xserver Migrator version. If version is 1.6.1 or earlier, you are vulnerable.Check Version:
# In WordPress root directory
grep -r "Version:" wp-content/plugins/xserver-migrator/Verify Fix Applied:
After update, confirm Xserver Migrator version is 1.6.2 or later in WordPress plugins list.📡 Detection & Monitoring
Log Indicators:
- Unusual file uploads via POST requests to Xserver Migrator endpoints
- CSRF attempts in access logs with referrer anomalies
Network Indicators:
- POST requests to /wp-admin/admin-ajax.php or plugin-specific endpoints with file uploads
- Unexpected file types (e.g., .php) uploaded to upload directories
SIEM Query:
source="web_logs" AND (url_path="/wp-admin/admin-ajax.php" OR url_path CONTAINS "xserver-migrator") AND method="POST" AND status=200🔗 References
- https://patchstack.com/database/vulnerability/xserver-migrator/wordpress-xserver-migrator-plugin-1-6-1-csrf-to-arbitrary-file-upload-vulnerability?_s_id=cve
- https://patchstack.com/database/vulnerability/xserver-migrator/wordpress-xserver-migrator-plugin-1-6-1-csrf-to-arbitrary-file-upload-vulnerability?_s_id=cve
