CVE-2025-0471
📋 TL;DR
An unrestricted file upload vulnerability in PMB platform versions 4.0.10 and above allows attackers to upload malicious files and gain remote code execution. This enables complete system compromise including data access, modification, and command execution. All organizations running vulnerable PMB platform versions are affected.
💻 Affected Systems
- PMB platform
📦 What is this software?
Pmb by Sigb
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise with attacker gaining root/admin privileges, data exfiltration, ransomware deployment, and persistent backdoor installation.
Likely Case
Web server compromise leading to data theft, website defacement, and lateral movement within the network.
If Mitigated
File upload attempts blocked or quarantined with no successful exploitation.
🎯 Exploit Status
CVSS 9.9 indicates trivial exploitation with high impact. Unauthenticated access makes this particularly dangerous.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check vendor advisory for specific patched version
Vendor Advisory: https://www.incibe.es/en/incibe-cert/notices/aviso/multiple-vulnerabilities-pmb-platform
Restart Required: Yes
Instructions:
1. Backup current installation and data
2. Download latest patched version from official PMB sources
3. Apply patch following vendor instructions
4. Restart PMB services
5. Verify fix implementation
🔧 Temporary Workarounds
File Upload Restriction
allImplement strict file type validation and upload restrictions
# Configure web server to block uploads of executable files
# Example Apache: SetEnvIf Request_URI "\.(php|exe|sh|bat)$" block_upload
# Example Nginx: location ~*\.(php|exe|sh|bat)$ { deny all; }
Web Application Firewall Rules
allDeploy WAF rules to block malicious file uploads
# ModSecurity rule example: SecRule FILES_TMPNAMES "@rx \.(php|exe|sh|bat)$" "id:1001,phase:2,deny,msg:'Malicious file upload attempt'"
🧯 If You Can't Patch
- Isolate PMB server in network segment with strict egress filtering
- Implement application-level file upload validation and sanitization
🔍 How to Verify
Check if Vulnerable:
Check PMB version against affected range (4.0.10+). Test file upload functionality with various file types.Check Version:
Check PMB admin interface or configuration files for version informationVerify Fix Applied:
Attempt to upload malicious file types (php, exe, etc.) and verify they are rejected. Check that only allowed file types can be uploaded.📡 Detection & Monitoring
Log Indicators:
- Unusual file uploads with executable extensions
- Multiple failed upload attempts
- Successful uploads of non-standard file types
Network Indicators:
- HTTP POST requests to upload endpoints with suspicious file names
- Outbound connections from PMB server to unknown IPs
SIEM Query:
source="pmb_logs" AND (file_upload="*.php" OR file_upload="*.exe" OR file_upload="*.sh")