A third-minute Joe Mason paved the way for a 4-0 hammering as Clarets striker Charlie Austin failed to score for the first time in nine games.
And caretaker boss Pashley said: "The goals we conceded were self-inflicted.
"After the first goal we never really recovered. We tried to be positive in the second half to try and get the next goal, but we conceded a third.
"It was poor decisions in open play and we got punished. But we all have to be accountable.
"Cardiff are top of the league and it's no fluke - they are playing consistent football. It was a tough afternoon for us."