CVE-2022-1538
📋 TL;DR
The Theme Demo Import WordPress plugin before version 1.1.1 contains an unrestricted file upload vulnerability. High-privilege users (administrators) can upload arbitrary files, including PHP files, even when WordPress security constants FILE_MODS and FILE_EDIT are disabled. This affects WordPress sites using the vulnerable plugin version.
💻 Affected Systems
- Theme Demo Import WordPress Plugin
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
An attacker with admin credentials could upload a malicious PHP file and achieve remote code execution, potentially leading to complete site compromise, data theft, or server takeover.
Likely Case
Compromised admin accounts could upload webshells or backdoors, enabling persistent access, data exfiltration, or further attacks on the server environment.
If Mitigated
With proper access controls and admin account security, the risk is limited to authorized administrators who might accidentally or intentionally upload malicious files.
🎯 Exploit Status
Exploitation requires admin-level credentials. The vulnerability is simple to exploit once credentials are obtained.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.1.1
Vendor Advisory: https://wpscan.com/vulnerability/b19adf7c-3983-487b-9b46-0f2922b08c1c/
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find 'Theme Demo Import' plugin. 4. Click 'Update Now' if update is available. 5. Alternatively, download version 1.1.1+ from WordPress repository and manually update.
🔧 Temporary Workarounds
Disable Plugin
allTemporarily disable the vulnerable plugin until patched.
wp plugin deactivate theme-demo-import
Remove Plugin
allCompletely remove the vulnerable plugin if not needed.
wp plugin delete theme-demo-import
🧯 If You Can't Patch
- Restrict admin account access to trusted users only and implement strong password policies.
- Implement file integrity monitoring on WordPress upload directories to detect unauthorized file uploads.
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel > Plugins > Installed Plugins for 'Theme Demo Import' version. If version is below 1.1.1, it is vulnerable.Check Version:
wp plugin get theme-demo-import --field=versionVerify Fix Applied:
After updating, verify plugin version shows 1.1.1 or higher in WordPress admin plugins list.📡 Detection & Monitoring
Log Indicators:
- Unusual file uploads to wp-content/uploads/theme-demo-import/ directory
- Admin user uploading .php files via plugin interface
Network Indicators:
- POST requests to /wp-admin/admin-ajax.php with action=theme_demo_import_ajax_file_upload
SIEM Query:
source="wordpress.log" AND ("theme_demo_import" OR "theme-demo-import") AND ("upload" OR "file_upload")