CVE-2025-29394
📋 TL;DR
An insecure file upload vulnerability in Verydows v2.0 allows remote attackers to upload malicious files and execute arbitrary code on the server. This affects all systems running Verydows v2.0 with default configurations, potentially leading to complete system compromise.
💻 Affected Systems
- Verydows
⚠️ 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 attacker gaining root/admin privileges, data exfiltration, ransomware deployment, and persistent backdoor installation.
Likely Case
Webshell upload leading to data theft, defacement, and lateral movement within the network.
If Mitigated
Attack blocked at web application firewall level with no file execution possible.
🎯 Exploit Status
Public proof-of-concept available on GitHub. Exploitation requires only web access to the vulnerable endpoint.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not available
Vendor Advisory: Not available
Restart Required: No
Instructions:
No official patch available. Consider upgrading to a newer version if available or implementing workarounds.
🔧 Temporary Workarounds
File Upload Restriction
allImplement strict file type validation and whitelist only allowed extensions
Modify upload handler to validate file extensions and MIME types
Web Application Firewall Rules
allBlock malicious file uploads at the WAF level
Configure WAF to block requests with suspicious file extensions or content
🧯 If You Can't Patch
- Isolate the Verydows instance in a DMZ with strict outbound firewall rules
- Implement file integrity monitoring on upload directories and alert on suspicious file creations
🔍 How to Verify
Check if Vulnerable:
Check if running Verydows v2.0. Attempt to upload a file with executable extension to verify if validation is missing.Check Version:
Check Verydows configuration files or admin panel for version informationVerify Fix Applied:
Test file upload functionality with various file types to ensure only allowed extensions are accepted.📡 Detection & Monitoring
Log Indicators:
- Unusual file uploads with executable extensions
- Multiple failed upload attempts
- Files with suspicious names in upload directories
Network Indicators:
- HTTP POST requests to upload endpoints with executable file content
- Unusual outbound connections from web server
SIEM Query:
source="web_logs" AND (uri="*upload*" OR uri="*file*" OR uri="*attachment*") AND (extension="php" OR extension="jsp" OR extension="asp" OR extension="exe")