@pitaj said in Can unregistered users can create topics?:
In ACP > Manage > Privileges, select the category you want to allow guests to post in, and give guests the "Create Topics" and "Reply to Topics" privileges.
so, anyone can tell me how to change admin login page?
I think it might be possible to reroute the admin page to another URL via a plugin, but at this point your account is already compromised (due to lack of secure password), so you're already in trouble anyways...