CVE-2025-52661: HCL AION JWT Token Expiry Vulnerability

CVE-2025-52661 Overview

HCL AION version 2 is affected by a JWT Token Expiry Too Long vulnerability (CWE-613: Insufficient Session Expiration). This security flaw stems from improperly configured JSON Web Token (JWT) expiration settings, which may increase the risk of token misuse, potentially resulting in unauthorized access if the token is compromised.

Critical Impact

Extended JWT token validity periods create a wider attack window for adversaries to exploit stolen or intercepted tokens, potentially enabling unauthorized access to protected resources and sensitive functionality.

Affected Products

• HCL AION version 2

Discovery Timeline

• 2026-01-19 - CVE CVE-2025-52661 published to NVD
• 2026-01-19 - Last updated in NVD database

Technical Details for CVE-2025-52661

Vulnerability Analysis

This vulnerability falls under CWE-613 (Insufficient Session Expiration), a weakness category that addresses scenarios where a web application permits an attacker to reuse old session credentials or session identifiers for authorization. In the context of HCL AION version 2, the JWT tokens are configured with excessively long expiration times, violating secure session management best practices.

JWT tokens serve as bearer credentials for authentication and authorization. When these tokens have extended validity periods, several security concerns emerge. A compromised token remains usable for an extended duration, giving attackers more time to leverage stolen credentials. Additionally, users cannot effectively revoke access by logging out since the token remains valid until expiration.

The attack requires network access and targets authenticated sessions. An attacker with high privileges who obtains a valid JWT token can maintain unauthorized access for the duration of the token's extended lifetime. While the direct impact is limited to potential integrity issues, this vulnerability could be chained with other attacks to achieve more significant compromise.

Root Cause

The root cause of this vulnerability is improper configuration of JWT token expiration parameters in HCL AION version 2. The application generates JWT tokens with validity periods that exceed security best practices, failing to implement appropriate session timeout controls. This configuration weakness allows tokens to remain valid for excessive periods, increasing the risk window for token-based attacks.

Attack Vector

The attack vector for CVE-2025-52661 is network-based and requires interaction with an authenticated user. An attacker must first obtain a valid JWT token through methods such as network interception, social engineering, or exploitation of other vulnerabilities. Once in possession of a token, the attacker can use it to access protected resources throughout the extended validity period.

The exploitation scenario typically involves:

1. An attacker intercepts or obtains a legitimate JWT token from an authorized user
2. Due to the excessive expiration time, the token remains valid far longer than necessary
3. The attacker uses the token to authenticate and access resources, potentially even after the legitimate user believes their session has ended
4. Standard session invalidation mechanisms fail to protect against this prolonged unauthorized access

Detection Methods for CVE-2025-52661

Indicators of Compromise

• JWT tokens with unusually long expiration timestamps being used across extended time periods
• Authentication events occurring with tokens that were issued significantly in the past
• Session activity continuing after user-initiated logout events

Detection Strategies

• Monitor authentication logs for JWT tokens being reused across extended time periods that exceed normal session durations
• Implement token validation logging to detect tokens with expiration times exceeding organizational security policies
• Analyze authentication patterns for anomalous access using tokens issued to users who are no longer actively working

Monitoring Recommendations

• Configure security monitoring to alert on JWT token usage patterns that suggest stolen credential abuse
• Implement real-time token validation monitoring to identify sessions exceeding maximum allowed durations
• Review authentication audit logs regularly for signs of token replay attacks or unauthorized session persistence

How to Mitigate CVE-2025-52661

Immediate Actions Required

• Review and reduce JWT token expiration times to align with security best practices (typically 15-60 minutes for access tokens)
• Implement token refresh mechanisms with shorter-lived access tokens and longer-lived refresh tokens
• Enable server-side session tracking to allow forced token invalidation when necessary

Patch Information

HCL has acknowledged this vulnerability and provided guidance through their support channels. Organizations running HCL AION version 2 should consult the HCL Software Knowledge Base Article for specific remediation steps and any available patches.

Workarounds

• Configure JWT token expiration to shorter durations within application settings if configurable
• Implement additional session validation mechanisms such as IP binding or device fingerprinting
• Deploy a web application firewall (WAF) with rules to detect and block potential token abuse
• Enable comprehensive logging of authentication events to facilitate detection of unauthorized token usage

# Example: Review current JWT configuration and token expiration settings
# Consult HCL documentation for specific configuration paths

# 1. Audit current token expiration settings in AION configuration
# 2. Reduce access token lifetime to 15-60 minutes maximum
# 3. Implement refresh token rotation with appropriate expiration
# 4. Enable token revocation capabilities for emergency response