The leaks continue even after tightening the toilet bolts? Did you check the wax ring? A failed wax ring will definitely cause a toilet leak at the base. If you found that the water is pooling around the base of the toilet replace it immediately. But check properly because the leak might not only happen from the base it can be from the loose supply tube, faulty shut off valve, cracked tank or sweaty bowl. The toilet become leaky because of this reasons too
1. Toilet water supply line is leaking
2. Fill valve nut of the water line is loose
3. Toilet tank has condensation on the outside
If the water is leaking from the point where the tank and base connect then look for the connection problem. In order to detect the actual reason, you can
call any toilet repair service provider and get their assistance to fix it.
Also, apply the caulk around the base of the toilet. It may help to prevent the leaks.