Mahara before 1.3.6 does not properly restrict the data in responses to AJAX calls which allows remote authenticated users to obtain sensitive information via a request associated with (1) blocktype/myfriends/myfriends.json.php (2) json/usersearch.php (3) group/membersearchresults.json.php or (4) json/friendsearch.php as demonstrated by information about friends and e-mail addresses.