CVE-2024-50531
📋 TL;DR
This vulnerability allows attackers to upload arbitrary files, including web shells, to WordPress sites running the RSVPMaker for Toastmasters plugin. Attackers can gain full control of affected websites, potentially compromising all site data and functionality. All WordPress installations using vulnerable versions of this plugin are affected.
💻 Affected Systems
- RSVPMaker for Toastmasters WordPress plugin
📦 What is this software?
Rsvpmaker by Carrcommunications
⚠️ Risk & Real-World Impact
Worst Case
Complete website takeover, data theft, defacement, malware distribution, and use as pivot point for attacking other systems.
Likely Case
Website compromise leading to data theft, defacement, or installation of backdoors for persistent access.
If Mitigated
Limited impact if file uploads are restricted via web application firewall or other controls.
🎯 Exploit Status
Exploitation requires authenticated access but is straightforward once access is obtained.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 6.2.5 or later
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find RSVPMaker for Toastmasters. 4. Click 'Update Now' if available. 5. Alternatively, download latest version from WordPress repository and replace plugin files.
🔧 Temporary Workarounds
Disable plugin
allTemporarily deactivate the vulnerable plugin until patched.
Restrict file uploads via .htaccess
linuxBlock execution of uploaded files in upload directories.
<FilesMatch "\.(php|php5|php7|phtml|phar)$">
Order Allow,Deny
Deny from all
</FilesMatch>
🧯 If You Can't Patch
- Disable the RSVPMaker for Toastmasters plugin immediately.
- Implement web application firewall rules to block malicious file uploads.
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel > Plugins > Installed Plugins for RSVPMaker for Toastmasters version 6.2.4 or earlier.Check Version:
wp plugin list --name=rsvpmaker-for-toastmasters --field=versionVerify Fix Applied:
Verify plugin version is 6.2.5 or later in WordPress admin panel.📡 Detection & Monitoring
Log Indicators:
- Unusual file uploads to wp-content/uploads/rsvpmaker directories
- POST requests to plugin upload endpoints with executable file extensions
Network Indicators:
- HTTP POST requests with file uploads to RSVPMaker endpoints
- Subsequent requests to newly uploaded PHP files
SIEM Query:
source="web_server" AND (uri_path="/wp-content/plugins/rsvpmaker-for-toastmasters/*" AND method="POST" AND file_extension IN ("php", "phtml", "phar"))