CVE-2023-0924
📋 TL;DR
The ZYREX POPUP WordPress plugin through version 1.0 allows administrators to upload arbitrary files without proper validation, bypassing file system restrictions in multisite installations. This vulnerability affects WordPress sites using this plugin, particularly those with multisite configurations where file uploads should be restricted.
💻 Affected Systems
- ZYREX POPUP WordPress Plugin
📦 What is this software?
Popup by Zyrex
⚠️ Risk & Real-World Impact
Worst Case
An attacker with administrator privileges could upload malicious files like webshells, leading to complete system compromise, data theft, or ransomware deployment.
Likely Case
Malicious administrators or compromised admin accounts could upload backdoors or malware to maintain persistent access or disrupt site operations.
If Mitigated
With proper access controls and file upload restrictions, impact is limited to authorized administrators making legitimate file uploads.
🎯 Exploit Status
Exploitation requires administrator access. Attack path is straightforward once admin credentials are compromised.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: None
Vendor Advisory: https://wpscan.com/vulnerability/0fd0d7a5-9263-43b6-9244-7880c3d3e6f4
Restart Required: No
Instructions:
1. Remove the ZYREX POPUP plugin completely from your WordPress installation. 2. Delete all plugin files from the wp-content/plugins directory. 3. Consider alternative popup plugins with proper security validation.
🔧 Temporary Workarounds
Disable Plugin
allDeactivate the ZYREX POPUP plugin without removing files
wp plugin deactivate zyrex-popup
Restrict File Uploads
allImplement server-side file type validation and upload restrictions
🧯 If You Can't Patch
- Implement strict access controls and monitoring for administrator accounts
- Deploy web application firewall rules to block suspicious file uploads
🔍 How to Verify
Check if Vulnerable:
Check if ZYREX POPUP plugin is installed and active in WordPress admin panel under PluginsCheck Version:
wp plugin list --name=zyrex-popup --field=versionVerify Fix Applied:
Confirm plugin is completely removed from wp-content/plugins directory and not listed in active plugins📡 Detection & Monitoring
Log Indicators:
- Unusual file uploads to popup creation endpoints
- Administrator account performing unexpected file uploads
Network Indicators:
- POST requests to /wp-admin/admin-ajax.php with file upload parameters
- Unusual file extensions being uploaded
SIEM Query:
source="wordpress" AND (uri_path="/wp-admin/admin-ajax.php" AND method="POST" AND file_upload="true")