HCL iNotes is susceptible to a Broken Password Strength Checks vulnerability. Custom password policies are not enforced on certain iNotes forms which could allow users to set weak passwords, leading to easier cracking.

HCL iNotes is susceptible to a Reflected Cross-site Scripting (XSS) vulnerability caused by improper validation of user-supplied input supplied with a form POST request. A remote attacker could exploit this vulnerability using a specially-crafted URL to execute script in a victim's web browser within the security context of the hosting web site and/or steal the victim's cookie-based authentication credentials.

HCL iNotes is susceptible to a link to non-existent domain vulnerability. An attacker could use this vulnerability to trick a user into supplying sensitive information such as username, password, credit card number, etc.