The unidentified victim is recovering from surgery at Crozer-Chester Medical Center in Upland, Dan Hanson, a university spokesman, said in a statement.
Police have not yet been able to talk to the victim, said Police Commissioner Joseph Bail.
"Until we have him interviewed by the detectives, we can't even speculate what is what," Bail said. Both city and campus police have increased their patrols on campus, he said.
Bail said police are looking at forensic evidence that includes video and a car.
"There are witnesses being interviewed," Bail said.
Police removed the car from the campus as part of the investigation.
In 2003, a junior communications major was killed as he walked from his campus apartment. John Paul Lacey, 21, of Upper Darby, was shot in the chest as he walked to an off-campus bar in the 1600 block of Providence Avenue to buy beer. He had just finished a shift at a local pizza shop and had $6 in his pocket at the time of his death.
Brandon Khalif Summers pleaded guilty to second-degree murder, and Jaliek Williams was found guilty of robbery.
In 2002, Widener student Abdul Sesay, 19, was shot to death near the campus. His roommate, Curtis Jones, was found guilty of murder.
According to the Widener University campus security report, there was one reported aggravated assault on the school's Chester campus in 2012. No robberies were reporter for 2010 to 2013.
Inquirer staff writer Robert Moran contributed to this article.