CVE-2023-5604
📋 TL;DR
The Asgaros Forum WordPress plugin before version 2.7.1 allows forum administrators (who may not have full WordPress admin privileges) to configure insecure file upload settings. This could enable unauthenticated users to upload dangerous file types like .php and .phtml, potentially leading to remote code execution. WordPress sites using vulnerable versions of the Asgaros Forum plugin are affected.
💻 Affected Systems
- Asgaros Forum WordPress Plugin
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete server compromise, data theft, malware deployment, or website defacement.
Likely Case
Unauthenticated attackers upload web shells to gain persistent access and execute arbitrary code on the server.
If Mitigated
Limited impact if file uploads are restricted by web server configuration or security plugins block execution.
🎯 Exploit Status
Exploitation requires the forum administrator to have enabled dangerous file uploads. Public proof-of-concept demonstrates the vulnerability.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.7.1
Vendor Advisory: https://wpscan.com/vulnerability/4ce69d71-87bf-4d95-90f2-63d558c78b69
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find Asgaros Forum and update to version 2.7.1 or later. 4. Verify the update completed successfully.
🔧 Temporary Workarounds
Restrict File Uploads via .htaccess
linuxBlock execution of PHP/PHTML files in upload directories
<FilesMatch "\.(php|phtml|php3|php4|php5|php7|phps|php-s|pht|phar)$">
Order Allow,Deny
Deny from all
</FilesMatch>
Disable Plugin
allTemporarily disable Asgaros Forum until patched
wp plugin deactivate asgaros-forum
🧯 If You Can't Patch
- Remove forum administrator roles from untrusted users
- Implement web application firewall rules to block malicious file uploads
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel > Plugins > Asgaros Forum version numberCheck Version:
wp plugin get asgaros-forum --field=versionVerify Fix Applied:
Confirm Asgaros Forum version is 2.7.1 or higher in WordPress plugins list📡 Detection & Monitoring
Log Indicators:
- File uploads of .php/.phtml files to forum upload directories
- Unusual POST requests to forum upload endpoints
Network Indicators:
- HTTP POST requests with file uploads to /wp-content/uploads/asgarosforum/ paths
SIEM Query:
source="web_server" AND (uri_path="/wp-content/uploads/asgarosforum/*" AND method="POST")