Click the member's username.
In the profile, you'll be able to see the user's account information, site activity, and functions to limit the activity of the user on the site, up to a full deactivation of his account. Additionally, below the information block you may check the user site permissions.
Undisclosed status means that the member didn't provide us with the consent to use his personal information.
According to GDPR law we are not authorized to provide anyone with the user's personal information until he/she allows us to.