CVE-2025-41714
📋 TL;DR
This vulnerability allows authenticated attackers to perform path traversal attacks via the 'Upload-Key' header, enabling arbitrary file writes outside intended directories. In certain configurations, this can lead to remote code execution. Systems using the affected upload endpoint with insufficient header validation are vulnerable.
💻 Affected Systems
- Specific product information not provided in CVE description
⚠️ 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
Remote code execution leading to complete system compromise, data exfiltration, or ransomware deployment.
Likely Case
Unauthorized file writes enabling data manipulation, privilege escalation, or denial of service through critical file overwrites.
If Mitigated
Limited to directory traversal without execution capabilities if proper file permissions and validation are enforced.
🎯 Exploit Status
Exploitation requires authentication but uses simple path traversal techniques; weaponization depends on specific configurations.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not specified
Vendor Advisory: https://certvde.com/de/advisories/VDE-2025-085
Restart Required: No
Instructions:
1. Monitor vendor advisory for patch release. 2. Apply patch when available. 3. Test in non-production environment first.
🔧 Temporary Workarounds
Input Validation Enhancement
allImplement strict validation of 'Upload-Key' header to reject path traversal sequences
# Add validation in upload endpoint code to sanitize header input
# Example: if '..' or '/' in upload_key: reject request
File System Restrictions
allConfigure application to run with minimal file system permissions
# Linux: chmod 750 upload_directory
# Windows: Set restrictive ACLs on upload folder
🧯 If You Can't Patch
- Implement web application firewall (WAF) rules to block path traversal patterns in headers
- Disable or restrict access to the vulnerable upload endpoint until patch is available
🔍 How to Verify
Check if Vulnerable:
Test upload endpoint with 'Upload-Key' header containing path traversal sequences (e.g., '../../etc/passwd')Check Version:
# Check software version via application interface or configuration filesVerify Fix Applied:
Verify that path traversal attempts in 'Upload-Key' header are rejected and no files are created outside intended directories📡 Detection & Monitoring
Log Indicators:
- Multiple failed upload attempts with suspicious 'Upload-Key' headers
- File creation events outside expected upload directories
Network Indicators:
- HTTP requests to upload endpoint with '..' or '/' sequences in 'Upload-Key' header
SIEM Query:
source="web_logs" AND uri="/upload" AND header="Upload-Key: *..*"