CVE-2025-52659
📋 TL;DR
HCL AION version 2 has a cacheable HTTP response vulnerability where sensitive or dynamic content may be stored in caches. This could allow unauthorized users to access cached information that should be protected. Organizations using HCL AION version 2 are affected.
💻 Affected Systems
- HCL AION
📦 What is this software?
Aion by Hcltech
⚠️ Risk & Real-World Impact
Worst Case
Sensitive user data, session information, or confidential business data could be exposed to unauthorized parties through cached HTTP responses.
Likely Case
Limited information disclosure of non-critical cached content, potentially exposing some user-specific data or application details.
If Mitigated
Minimal impact with proper cache control headers and security configurations in place.
🎯 Exploit Status
Exploitation requires access to cached responses, which may be available through shared caches or browser caches.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check vendor advisory for specific patched version
Vendor Advisory: https://support.hcl-software.com/kb_view.do?sys_kb_id=4b92474633de7ad4159a05273e5c7b4b&searchTerm=kb0127995#
Restart Required: Yes
Instructions:
1. Review the HCL advisory for specific patch details
2. Apply the recommended patch from HCL
3. Restart the AION service
4. Verify cache control headers are properly configured
🔧 Temporary Workarounds
Configure Cache-Control Headers
allAdd appropriate Cache-Control headers to prevent caching of sensitive responses
Configure web server or application to add: Cache-Control: no-store, no-cache, must-revalidate, private
Disable Shared Caching
allConfigure reverse proxies and CDNs to not cache sensitive endpoints
Configure caching rules to exclude sensitive AION endpoints from caching
🧯 If You Can't Patch
- Implement strict cache control headers for all sensitive endpoints
- Monitor and audit cache storage for sensitive data exposure
🔍 How to Verify
Check if Vulnerable:
Check if HCL AION version 2 is installed and examine HTTP response headers for missing or weak cache control directives on sensitive endpointsCheck Version:
Check AION administration console or installation documentation for version informationVerify Fix Applied:
Verify that Cache-Control headers are present and properly configured on all sensitive endpoints, and confirm AION version is updated📡 Detection & Monitoring
Log Indicators:
- Multiple requests for the same sensitive resource from different users
- Unusual cache hit patterns on sensitive endpoints
Network Indicators:
- HTTP responses without proper Cache-Control headers on sensitive endpoints
- Cached responses containing user-specific data
SIEM Query:
Search for HTTP responses from AION with status 200 and missing Cache-Control headers on sensitive endpoints