CVE-2025-52603: HCL Connections Info Disclosure Flaw

CVE-2025-52603 Overview

HCL Connections is vulnerable to an information disclosure flaw that can expose internal metadata to authenticated users. In a very specific user navigation scenario, this vulnerability could allow a user to obtain limited information when a single piece of internal metadata is returned in the browser. This represents a CWE-213 (Exposure of Sensitive Information Due to Incompatible Policies) weakness.

Critical Impact

Authenticated users may obtain limited internal metadata through specific navigation patterns, potentially revealing sensitive internal system information.

Affected Products

• HCL Connections 7.0
• HCL Connections 8.0 (Base and all Cumulative Releases 1-10)
• HCL Connections 8.0 Cumulative Release 1 through Cumulative Release 10

Discovery Timeline

• 2026-02-20 - CVE-2025-52603 published to NVD
• 2026-02-20 - Last updated in NVD database

Technical Details for CVE-2025-52603

Vulnerability Analysis

This information disclosure vulnerability in HCL Connections stems from improper handling of internal metadata during specific user navigation flows. The vulnerability is classified under CWE-213 (Exposure of Sensitive Information Due to Incompatible Policies), indicating that the application fails to properly enforce access controls or filtering for sensitive internal data.

The attack requires network access and authenticated user privileges, though user interaction is also required as the disclosure only occurs during specific navigation scenarios. The impact is limited to confidentiality, with no effect on integrity or availability of the system.

Root Cause

The vulnerability originates from a policy mismatch within HCL Connections where internal metadata is inadvertently exposed to the browser under specific navigation conditions. This suggests that certain application responses include metadata that should be filtered or excluded based on the user's authorization level, but the filtering mechanism does not properly account for all navigation paths within the application.

Attack Vector

The attack vector is network-based and requires an authenticated user to perform specific navigation actions within the HCL Connections interface. An attacker would need valid credentials to access the application and then follow a particular sequence of navigation steps that triggers the metadata exposure.

The exploitation scenario involves:

1. An attacker authenticates to the HCL Connections platform with valid credentials
2. The attacker navigates through a specific sequence of pages or actions
3. During this navigation, the application inadvertently returns internal metadata in the browser response
4. The attacker captures this metadata which may contain limited but sensitive internal information

Due to the specific conditions required for exploitation and the limited nature of the information disclosed, this vulnerability presents a lower risk profile but should still be addressed to prevent potential reconnaissance activities.

Detection Methods for CVE-2025-52603

Indicators of Compromise

• Monitor HTTP responses for unexpected metadata fields being returned to clients
• Review browser developer tools network traffic for responses containing internal system identifiers or metadata
• Check application logs for unusual navigation patterns that may indicate exploitation attempts

Detection Strategies

• Implement HTTP response monitoring to detect internal metadata leakage in client-facing responses
• Deploy application-level logging to track user navigation sequences that could trigger the vulnerability
• Use web application firewalls (WAF) to inspect outbound traffic for sensitive metadata patterns
• Enable audit logging for HCL Connections to track user activity and access patterns

Monitoring Recommendations

• Configure alerting for HTTP responses containing internal metadata field names
• Monitor for repeated access patterns that match the specific navigation scenario
• Implement user behavior analytics to detect anomalous navigation sequences
• Review access logs regularly for authenticated users performing unusual navigation actions

How to Mitigate CVE-2025-52603

Immediate Actions Required

• Review the HCL Software Knowledge Base Article for vendor-specific remediation guidance
• Assess all HCL Connections deployments running versions 7.0 and 8.0 (including Cumulative Releases 1-10)
• Implement monitoring for potential exploitation attempts while awaiting patch deployment
• Consider restricting access to non-essential HCL Connections features until patched

Patch Information

HCL has published security guidance for this vulnerability. Organizations should consult the official HCL Software Knowledge Base Article for detailed patching instructions and the latest available security updates. Ensure all HCL Connections instances are updated to the remediated version specified in the vendor advisory.

Workarounds

• Limit authenticated access to HCL Connections to trusted users only until the patch is applied
• Implement network segmentation to restrict access to HCL Connections from untrusted network segments
• Deploy a web application firewall (WAF) with rules to filter sensitive metadata from outbound responses
• Enable verbose logging to detect and investigate potential exploitation attempts