A UW-Whitewater student was attacked by a man wielding a baseball bat outside a near west side house where a party was going on early Saturday morning, Madison police reported. The 20-year-old male student suffered a gash to his hand when the attacker used the bat to smash a glass beer mug the victim was holding, according to a police news release. The attack was reported at 3:26 a.m. Saturday in the 1100 block of Mound Street.