You should be a attentively.
“attachment cans” located in “Forum Accesses” setting page
Please take a look to this screenshot https://www.screencast.com/t/mTgwH3gvM
Hi jmlecun,
please navigate in “Dashboard > Forums > Usergroups” admin page and |EDIT| “Registered” usergroup CANS ( turn off “Front – Can view members” and “Front – Can view profiles” options).