CVE-2025-52660
📋 TL;DR
HCL AION has an unrestricted file upload vulnerability that allows attackers to upload malicious files. This could lead to remote code execution or system compromise if exploited. Organizations using HCL AION are affected.
💻 Affected Systems
- HCL AION
📦 What is this software?
Aion by Hcltech
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise through remote code execution, data theft, and lateral movement within the network.
Likely Case
Malicious file upload leading to web shell installation, data exfiltration, or denial of service.
If Mitigated
Limited impact with proper file validation and access controls in place.
🎯 Exploit Status
File upload vulnerabilities typically have low exploitation complexity once the vulnerability is identified
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check vendor advisory for specific fixed versions
Vendor Advisory: https://support.hcl-software.com/kb_view.do?sys_kb_id=4b92474633de7ad4159a05273e5c7b4b&searchTerm=kb0127995#
Restart Required: Yes
Instructions:
1. Review vendor advisory for affected versions
2. Download and apply the latest patch from HCL
3. Restart the AION service
4. Verify the fix is applied
🔧 Temporary Workarounds
Implement file upload restrictions
allConfigure web application firewall or application settings to restrict file uploads to specific file types and sizes
Isolate upload directory
linuxStore uploaded files in a separate directory with no execute permissions
chmod -R 644 /path/to/upload/directory/*
chown -R www-data:www-data /path/to/upload/directory
🧯 If You Can't Patch
- Implement strict file type validation at the application level
- Deploy a WAF with file upload protection rules
- Monitor file upload activity and audit logs regularly
- Restrict network access to AION instances
🔍 How to Verify
Check if Vulnerable:
Check if your AION version matches affected versions in vendor advisoryCheck Version:
Check AION administration console or configuration files for version informationVerify Fix Applied:
Verify patch installation and test file upload functionality with malicious file attempts📡 Detection & Monitoring
Log Indicators:
- Unusual file upload activity
- Uploads of executable files or scripts
- Multiple failed upload attempts
Network Indicators:
- HTTP POST requests to upload endpoints with suspicious file extensions
- Unusual outbound connections from AION server
SIEM Query:
source="aion_logs" AND (file_upload OR POST /upload) AND (extension="php" OR extension="jsp" OR extension="exe")