CVE-2025-52631: HCL AION HSTS Header Vulnerability

CVE-2025-52631 Overview

HCL AION is affected by a Missing or Insecure HTTP Strict-Transport-Security (HSTS) Header vulnerability. This security weakness allows insecure connections to be established, potentially exposing the application to man-in-the-middle (MITM) attacks and protocol downgrade attacks. When HSTS headers are missing or improperly configured, browsers may not enforce HTTPS connections, allowing attackers to intercept or manipulate traffic.

Critical Impact

Applications lacking proper HSTS configuration are susceptible to protocol downgrade attacks where attackers can force connections to use unencrypted HTTP, enabling interception of sensitive data and session hijacking.

Affected Products

• HCL AION version 2.0

Discovery Timeline

• 2026-02-03 - CVE CVE-2025-52631 published to NVD
• 2026-02-04 - Last updated in NVD database

Technical Details for CVE-2025-52631

Vulnerability Analysis

This vulnerability stems from the absence or misconfiguration of the HTTP Strict-Transport-Security (HSTS) header in HCL AION version 2.0. HSTS is a critical web security mechanism that instructs browsers to only communicate with the server over HTTPS connections. Without this protection, the application becomes vulnerable to several attack scenarios.

The vulnerability is classified under CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor). When HSTS is not enforced, attackers positioned on the network path between users and the server can exploit this weakness through SSL stripping techniques or by intercepting initial HTTP requests before they are redirected to HTTPS.

The attack requires network positioning and some user interaction, making exploitation conditional on specific circumstances. However, in scenarios such as public Wi-Fi networks or compromised network infrastructure, this vulnerability presents a tangible risk to data confidentiality.

Root Cause

The root cause of this vulnerability is the missing or improperly configured Strict-Transport-Security HTTP response header in HCL AION. When this header is absent, browsers do not receive the instruction to enforce HTTPS-only communication for subsequent requests to the domain. This allows the first request to potentially be sent over unencrypted HTTP, creating a window for man-in-the-middle attacks.

Attack Vector

The attack vector for this vulnerability is network-based. An attacker must be positioned to intercept network traffic between the victim and the HCL AION server. Common attack scenarios include:

1. SSL Stripping: An attacker intercepts the initial HTTP request and maintains an unencrypted connection with the victim while establishing their own encrypted connection to the legitimate server.

2. Protocol Downgrade: Without HSTS preloading or cached HSTS policies, an attacker can force the browser to use HTTP instead of HTTPS, exposing session tokens and credentials.

3. Cookie Theft: Session cookies transmitted over unencrypted connections can be captured, enabling session hijacking attacks.

The vulnerability exploitation requires the attacker to have network access (such as through a rogue access point or ARP spoofing) and typically requires some user interaction, such as clicking a link or visiting the application.

Detection Methods for CVE-2025-52631

Indicators of Compromise

• HTTP traffic observed on port 80 to HCL AION servers where only HTTPS should be used
• Missing Strict-Transport-Security header in HTTP responses from the application
• Unusual network traffic patterns suggesting man-in-the-middle positioning
• Session anomalies indicating potential session hijacking attempts

Detection Strategies

• Implement network monitoring to detect unencrypted HTTP traffic to HCL AION endpoints
• Deploy SSL/TLS inspection tools to verify proper certificate validation and HTTPS enforcement
• Use security scanning tools to audit HTTP response headers for HSTS compliance
• Monitor for ARP spoofing or rogue DHCP servers that could facilitate MITM attacks

Monitoring Recommendations

• Enable logging for all HTTP and HTTPS connections to HCL AION instances
• Configure alerts for connections that do not use TLS encryption
• Periodically scan application responses for security header compliance
• Monitor browser security warnings reported by end users

How to Mitigate CVE-2025-52631

Immediate Actions Required

• Review and apply guidance from the HCL Software Knowledge Base Article
• Configure the HSTS header on web servers hosting HCL AION with appropriate max-age values
• Ensure all HTTP traffic is redirected to HTTPS at the network or application layer
• Consider submitting the domain to the HSTS preload list for enhanced protection

Patch Information

HCL Software has published guidance regarding this vulnerability. Administrators should consult the HCL Software Knowledge Base Article for official remediation steps and any available patches or updates for HCL AION version 2.0.

Workarounds

• Implement HSTS headers at the web server or reverse proxy level if application-level configuration is not immediately available
• Deploy a Web Application Firewall (WAF) to inject HSTS headers into responses
• Enforce HTTPS-only policies through network-level controls and firewall rules
• Educate users to manually type https:// when accessing the application

# Example Apache configuration to enable HSTS
# Add to virtual host configuration for HCL AION
Header always set Strict-Transport-Security "max-age=31536000; includeSubDomains; preload"

# Example Nginx configuration
# Add to server block
add_header Strict-Transport-Security "max-age=31536000; includeSubDomains; preload" always;