CVE-2025-52633
📋 TL;DR
HCL AION stores sensitive session information in persistent cookies that survive browser sessions, potentially allowing attackers to hijack user sessions if they obtain these cookies. This affects all users of HCL AION version 2.0. The vulnerability could lead to unauthorized access to application data and functions.
💻 Affected Systems
- HCL AION
📦 What is this software?
Aion by Hcltech
⚠️ Risk & Real-World Impact
Worst Case
Attackers with access to persistent cookies could impersonate legitimate users indefinitely, gaining unauthorized access to sensitive data and administrative functions within AION.
Likely Case
Session hijacking where attackers with cookie access (through XSS, network interception, or stolen devices) gain temporary unauthorized access to user accounts.
If Mitigated
Limited impact with proper network segmentation, HTTPS enforcement, and short session timeouts, though risk remains if cookies are compromised.
🎯 Exploit Status
Exploitation requires access to persistent cookies through other attack vectors like XSS, network sniffing, or physical access to devices.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check vendor advisory for specific patched version
Vendor Advisory: https://support.hcl-software.com/csm?id=kb_article&sysparm_article=KB0127972
Restart Required: Yes
Instructions:
1. Review HCL advisory KB0127972
2. Apply recommended patch/update from HCL
3. Restart AION services
4. Clear existing persistent cookies from browsers
🔧 Temporary Workarounds
Enforce HTTPS and Secure Cookie Flags
allConfigure AION to use HTTPS exclusively and set Secure and HttpOnly flags on all cookies
Configure in AION application settings: Set cookie flags Secure=True, HttpOnly=True
Reduce Session Timeout
allDecrease session timeout values to limit cookie validity period
Configure in AION: Set session timeout to minimum practical value (e.g., 15-30 minutes)
🧯 If You Can't Patch
- Implement network segmentation to isolate AION from untrusted networks
- Deploy web application firewall with session protection rules
- Monitor for unusual session activity and cookie theft attempts
- Educate users about secure browsing practices and device security
🔍 How to Verify
Check if Vulnerable:
Inspect browser cookies after AION login - look for persistent cookies containing session identifiers that survive browser restartCheck Version:
Check AION administration console or consult system documentation for version informationVerify Fix Applied:
Verify cookies are now session-only (non-persistent) and contain Secure/HttpOnly flags after applying patch📡 Detection & Monitoring
Log Indicators:
- Multiple sessions from same cookie
- Session creation without proper authentication flow
- Cookie reuse from different IP addresses
Network Indicators:
- HTTP traffic containing persistent session cookies
- Unencrypted transmission of session cookies
SIEM Query:
source="aion_logs" AND (event="session_hijack" OR cookie_reuse="true")