Directory Traversal with ../ sequences occurs in AccountsService before 0.6.50 because of an insufficient path check in user_change_icon_file_authorized_cb() in user.c.
https://cgit.freedesktop.org/accountsservice/commit/?id=f9abd359f71a5bce421b9ae23432f539a067847a
https://bugzilla.suse.com/show_bug.cgi?id=1099699
https://bugs.freedesktop.org/show_bug.cgi?id=107085