HCL Connections is vulnerable to a denial of service, caused by improper validation on certain requests. Using a specially-crafted request an attacker could exploit this vulnerability to cause denial of service for affected users.

HCL Connections is vulnerable to an information disclosure vulnerability which could allow a user to obtain sensitive information they are not entitled to, caused by improper handling of request data.

HCL Connections is vulnerable to a cross-site scripting attack where an attacker may leverage this issue to execute arbitrary script code in the browser of an unsuspecting user after visiting the vulnerable URL which leads to executing malicious script code. This may let the attacker steal cookie-based authentication credentials and comprise a user's account then launch other attacks.

HCL Connections v5.5, v6.0, and v6.5 contains an open redirect vulnerability which could be exploited by an attacker to conduct phishing attacks.

"HCL Connections is vulnerable to possible information leakage and could disclose sensitive information via stack trace to a local user."

HCL Connections v5.5, v6.0, and v6.5 are vulnerable to cross-site scripting. This vulnerability allows users to embed arbitrary JavaScript code in the Web UI thus altering the intended functionality potentially leading to credentials disclosure within a trusted session.

HCL Connections 6.5 is vulnerable to possible information leakage. Connections could disclose sensitive information via trace logs to a local user.