CVE-2025-65783
📋 TL;DR
An arbitrary file upload vulnerability in Hubert Hub v2.0 allows attackers to upload malicious PDF files to execute arbitrary code on affected systems. This affects all users running vulnerable versions of the software, potentially leading to complete system compromise.
💻 Affected Systems
- Hubert Imoveis e Administracao Ltda Hub
📦 What is this software?
Hub by Hubert
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise with remote code execution, data exfiltration, and lateral movement within the network.
Likely Case
Web server compromise leading to data theft, defacement, or deployment of malware.
If Mitigated
Limited impact with proper file validation and execution restrictions in place.
🎯 Exploit Status
Exploitation requires only uploading a crafted PDF file; public research available on GitHub.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Unknown
Restart Required: No
Instructions:
No official patch available; implement workarounds and monitor vendor for updates.
🔧 Temporary Workarounds
Disable upload endpoint
allTemporarily disable or block access to the /utils/uploadFile component
# Configure web server to block /utils/uploadFile
# Example for Apache: RewriteRule ^/utils/uploadFile - [F]
# Example for Nginx: location /utils/uploadFile { deny all; }
Implement file validation
allAdd server-side validation to restrict uploaded files to safe types
# Implement file type validation in application code
# Example: validate file extension and MIME type
# Reject any PDF uploads or implement strict validation
🧯 If You Can't Patch
- Implement network segmentation to isolate affected systems
- Deploy web application firewall with file upload protection rules
🔍 How to Verify
Check if Vulnerable:
Check if /utils/uploadFile endpoint accepts PDF files without proper validation; test with safe test files.Check Version:
Check application version in admin panel or configuration files; look for version 1.27.3.Verify Fix Applied:
Verify upload endpoint is disabled or properly validates file types; test with malicious PDF files.📡 Detection & Monitoring
Log Indicators:
- Unusual PDF uploads to /utils/uploadFile
- Large or suspicious file uploads
- Execution of unexpected processes
Network Indicators:
- HTTP POST requests to /utils/uploadFile with PDF files
- Unusual outbound connections from web server
SIEM Query:
source="web_server" AND (uri="/utils/uploadFile" AND file_extension="pdf")