Overview
CVE-2025-52639 is a low-severity sensitive information disclosure vulnerability affecting HCL Connections. Discovered on November 18, 2025, this vulnerability could allow an unauthorized user to gain access to sensitive information they should not be entitled to view. The root cause lies in the improper rendering of application data within HCL Connections.
Technical Details
The vulnerability stems from how HCL Connections handles and displays application data. Specifically, the improper rendering process can expose sensitive information. This exposure can happen through various means, such as revealing data in unexpected HTML attributes, failing to properly sanitize data before display, or through inconsistencies in access control checks during data rendering. While the exact exploitation vector is not fully detailed in the public description, the core issue centers around the flawed data rendering mechanism.
CVSS Analysis
The Common Vulnerability Scoring System (CVSS) assigns CVE-2025-52639 a score of 3.5, indicating a Low severity. This score reflects the limited scope of the vulnerability, as the successful exploitation might require specific conditions and may not lead to a complete compromise of the system. However, the impact of even low-severity information disclosure vulnerabilities should not be underestimated, as they can be chained with other vulnerabilities to achieve a more significant attack.
Possible Impact
Although the severity is rated as low, the potential impact of CVE-2025-52639 should be considered. Successful exploitation could lead to:
- Disclosure of confidential user data.
- Exposure of internal application configurations.
- Potential for privilege escalation when combined with other vulnerabilities.
Mitigation or Patch Steps
HCL has released a patch or workaround to address CVE-2025-52639. Users of HCL Connections are strongly advised to:
- Immediately apply the latest available patch from HCL. Check the reference link below for the specific patch version and instructions.
- Review access control configurations within HCL Connections to ensure proper data segregation.
- Monitor HCL Connections logs for any suspicious activity related to information access.
