CVE-2024-32954
📋 TL;DR
This vulnerability allows attackers to upload arbitrary files to WordPress sites running the Tribulant Newsletters plugin. Attackers can upload malicious files like PHP shells to gain remote code execution. All WordPress sites using Newsletters plugin versions up to 4.9.5 are affected.
💻 Affected Systems
- WordPress Tribulant Newsletters 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 server compromise leading to data theft, ransomware deployment, or use as part of a botnet.
Likely Case
Website defacement, malware distribution, or backdoor installation for persistent access.
If Mitigated
Limited impact if file uploads are restricted at web server level or WAF blocks malicious uploads.
🎯 Exploit Status
Exploitation requires no authentication and is trivial with publicly available proof-of-concept code.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 4.9.6 or later
Vendor Advisory: https://patchstack.com/database/vulnerability/newsletters-lite/wordpress-newsletters-plugin-4-9-5-arbitrary-file-upload-vulnerability
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find 'Newsletters' plugin. 4. Click 'Update Now' if update available. 5. If no update appears, manually download version 4.9.6+ from WordPress.org and replace plugin files.
🔧 Temporary Workarounds
Disable plugin
allTemporarily disable the Newsletters plugin until patched
wp plugin deactivate newsletters-lite
Restrict file uploads
linuxConfigure web server to block PHP file uploads to plugin directories
# In .htaccess for Apache: <FilesMatch "\.(php|phtml|php3|php4|php5|php7|phps)$">
Deny from all
</FilesMatch>
# In nginx config: location ~ \.(php|phtml|php3|php4|php5|php7|phps)$ {
deny all;
}
🧯 If You Can't Patch
- Immediately disable the Newsletters plugin via WordPress admin or command line
- Implement web application firewall rules to block file uploads to /wp-content/plugins/newsletters/ directories
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin > Plugins > Installed Plugins for Newsletters version 4.9.5 or earlierCheck Version:
wp plugin get newsletters-lite --field=versionVerify Fix Applied:
Confirm plugin version is 4.9.6 or higher in WordPress admin panel📡 Detection & Monitoring
Log Indicators:
- File uploads to /wp-content/plugins/newsletters/ directories
- POST requests to newsletters.php with file parameters
- Unusual file extensions (.php, .phtml) in upload logs
Network Indicators:
- HTTP POST requests containing multipart/form-data to newsletters endpoints
- Unexpected file uploads to plugin directories
SIEM Query:
source="web_logs" AND (uri_path="/wp-content/plugins/newsletters/*" AND method="POST" AND content_type="multipart/form-data")