CVE-2024-50427
📋 TL;DR
This vulnerability allows attackers to upload arbitrary files to WordPress sites using the SurveyJS plugin, potentially leading to remote code execution. It affects all WordPress installations with SurveyJS: Drag & Drop WordPress Form Builder plugin versions up to 1.9.136. Attackers can exploit this without authentication to compromise vulnerable websites.
💻 Affected Systems
- SurveyJS: Drag & Drop WordPress Form Builder
⚠️ 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 server compromise via webshell upload leading to data theft, ransomware deployment, or website defacement.
Likely Case
Webshell installation allowing persistent backdoor access, data exfiltration, or malware distribution.
If Mitigated
File upload attempts blocked at web application firewall level with no successful exploitation.
🎯 Exploit Status
Simple HTTP POST requests with malicious file uploads can exploit this vulnerability.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.9.137 or later
Vendor Advisory: https://patchstack.com/database/vulnerability/surveyjs/wordpress-surveyjs-plugin-1-9-136-arbitrary-file-upload-vulnerability?_s_id=cve
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins. 3. Find SurveyJS plugin. 4. Click 'Update Now' if update available. 5. Alternatively, download version 1.9.137+ from WordPress repository and manually update.
🔧 Temporary Workarounds
Disable plugin
allTemporarily disable the SurveyJS plugin until patched
wp plugin deactivate surveyjs
WAF file upload blocking
allConfigure web application firewall to block PHP and executable file uploads to WordPress upload directories
🧯 If You Can't Patch
- Implement strict file upload validation at server level using .htaccess or nginx rules
- Restrict write permissions on WordPress upload directories to prevent PHP execution
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel > Plugins > SurveyJS version. If version is 1.9.136 or lower, system is vulnerable.Check Version:
wp plugin get surveyjs --field=versionVerify Fix Applied:
Verify plugin version is 1.9.137 or higher in WordPress admin panel.📡 Detection & Monitoring
Log Indicators:
- Unusual file uploads to /wp-content/uploads/surveyjs/
- POST requests to surveyjs upload endpoints with PHP/executable files
- 404 errors for unexpected PHP files in upload directories
Network Indicators:
- HTTP POST requests to */wp-content/plugins/surveyjs/* upload endpoints
- Unusual outbound connections from WordPress server after file uploads
SIEM Query:
source="wordpress" AND (uri_path="/wp-content/plugins/surveyjs/" AND method="POST") AND (file_extension="php" OR file_extension="exe" OR file_extension="sh")