Today when I’m trying to looking for latest vulnerability from exploit-db.com, I was surprised because that site displayed error page. “Error 503 Service Unavailable“.
I take this print screen at 16:15PM (GMT +8).
AFAIK this “Error 503 Service Unavailable” means that this server was in a maintenance or it was overloading.
Maybe if exploit DB site was in a maintenance they will not put that error 503 in their main page. Then the other probability is Denial of Service that cause the server overloaded and down.