CVE-2025-49071
📋 TL;DR
This critical vulnerability in the NasaTheme Flozen WordPress theme allows attackers to upload arbitrary files, including web shells, to the web server. This can lead to complete system compromise. All WordPress installations using vulnerable versions of the Flozen theme are affected.
💻 Affected Systems
- NasaTheme Flozen WordPress Theme
⚠️ 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 takeover with remote code execution, data exfiltration, lateral movement, and persistent backdoor installation.
Likely Case
Web shell upload leading to website defacement, data theft, and further exploitation of the hosting environment.
If Mitigated
File upload blocked or sanitized, preventing malicious file execution.
🎯 Exploit Status
Exploitation requires authenticated user access. Attack tools are publicly available.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.5.2 or later
Vendor Advisory: https://patchstack.com/database/wordpress/theme/flozen-theme/vulnerability/wordpress-flozen-1-5-1-arbitrary-file-upload-vulnerability?_s_id=cve
Restart Required: No
Instructions:
1. Update Flozen theme to version 1.5.2 or later via WordPress admin panel. 2. Verify theme version in Appearance > Themes. 3. Clear any caching plugins.
🔧 Temporary Workarounds
Disable File Uploads
allRestrict file upload functionality in WordPress or web server configuration
Add to .htaccess: <FilesMatch "\.(php|php3|php4|php5|phtml|pl|py|jsp|asp|sh|cgi)$">\n Order Allow,Deny\n Deny from all\n</FilesMatch>
Switch to Default Theme
linuxTemporarily activate default WordPress theme until Flozen is patched
wp theme activate twentytwentyfour
🧯 If You Can't Patch
- Immediately deactivate and remove the Flozen theme from WordPress
- Implement web application firewall rules to block file upload requests to vulnerable endpoints
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel > Appearance > Themes for Flozen theme version 1.5.1 or earlierCheck Version:
wp theme list --name=flozen --field=versionVerify Fix Applied:
Confirm Flozen theme version is 1.5.2 or later in WordPress admin📡 Detection & Monitoring
Log Indicators:
- POST requests to /wp-content/themes/flozen/upload.php with file uploads
- Unusual file creations in wp-content/uploads with .php extensions
- Web server error logs showing file upload attempts
Network Indicators:
- HTTP POST requests to theme-specific upload endpoints
- Unusual outbound connections from web server post-upload
SIEM Query:
source="web_server" AND (uri_path="/wp-content/themes/flozen/upload.php" OR file_extension="php") AND http_method="POST"