The 24-year-old Brazilian international has also been linked with moves to Manchester City and Inter Milan.
"I do not know what will happen in June. Nor can I say with certainty that I will stay or go away, we will see," Paulinho is quoted as saying by talkSPORT.
"For the time being I am fully concentrated on Corinthians - what happens in the market, in summer or winter, we will see."
Paulinho joined Corinthians from Bragantino in 2010.