Hillside police tell The Star-Ledger that the shooting occurred around 2:15 a.m. Friday in front of the Sigma Theta Chi fraternity house.
Authorities say a scuffle ensued when the man was asked to leave the party, though it's not clear why the request was made. He returned minutes later with a handgun and fired multiple shots at the house while partygoers were standing on the porch and the front lawn.
The wounded man, identified only as a Kean University student, was hospitalized in stable condition with a gunshot wound in the stomach. No other injuries were reported.
Police do not believe the shooter goes to the school.