Caulker said that there was not anything the players could do about the leaks, and that he and his teammates were just focusing on the upcoming clash with Southampton.
"To be honest with you, there have been problems like that all season where certain things have been leaked," he told Sky Sports News. "For me, it is frustrating. We need to focus on getting things right on the pitch, not what's going on off the pitch.
"I will be telling the boys that we need to get performances in and get results, not concern ourselves with off the field issues.
"It has obviously come from somewhere. That's down to the gaffer and the staff above him to sort stuff out, and we can just focus on playing football."
Cardiff are currently 19th in the Premier League with just five games to play.