CVE-2025-61506
📋 TL;DR
MediaCrush versions through 1.0.1 contain an unrestricted file upload vulnerability that allows unauthenticated attackers to upload arbitrary files of any size. This affects all MediaCrush instances with the vulnerable /upload endpoint exposed, potentially leading to server compromise.
💻 Affected Systems
- MediaCrush
📦 What is this software?
Mediacrush by Mediacrush
⚠️ Risk & Real-World Impact
Worst Case
Complete server takeover via remote code execution by uploading malicious files like webshells, leading to data theft, ransomware deployment, or use as attack infrastructure.
Likely Case
Denial of service through disk space exhaustion from large file uploads, or web shell deployment for persistent access and data exfiltration.
If Mitigated
Limited impact if file uploads are restricted to authenticated users with proper file type validation and size limits.
🎯 Exploit Status
Simple HTTP POST requests to /upload endpoint with malicious files can exploit this vulnerability.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: unknown
Vendor Advisory: unknown
Restart Required: No
Instructions:
No official patch available. Consider workarounds or discontinuing use of MediaCrush.
🔧 Temporary Workarounds
Implement file upload restrictions
allAdd authentication to /upload endpoint and implement file type validation and size limits.
# Modify MediaCrush configuration to require authentication for uploads
# Implement file validation in upload handler
Web Application Firewall rules
allBlock or restrict access to /upload endpoint using WAF rules.
# Example nginx rule: location /upload { deny all; }
# Example Apache rule: <Location /upload> Require all denied </Location>
🧯 If You Can't Patch
- Disable or block access to the /upload endpoint entirely
- Implement network segmentation to isolate MediaCrush instances
🔍 How to Verify
Check if Vulnerable:
Test if unauthenticated file uploads to /upload endpoint are accepted without size or type restrictions.Check Version:
Check MediaCrush version in configuration files or application metadata.Verify Fix Applied:
Verify that uploads now require authentication and have proper file validation.📡 Detection & Monitoring
Log Indicators:
- Unusually large file uploads
- Multiple failed upload attempts
- Uploads of suspicious file types (e.g., .php, .exe)
Network Indicators:
- HTTP POST requests to /upload endpoint from unauthenticated sources
- Large upload traffic spikes
SIEM Query:
source="web_logs" AND (uri_path="/upload" AND http_method="POST") AND user_agent NOT IN allowed_user_agents