Mr Wong was returning from McDonalds when he saw the fox, and decided to offer it some of his chicken nuggets. However, the fox stole his bag, and bit his hand.
"Maybe he was getting more friendly, or maybe more courageous, but he started going for my slippers and I had to dance to avoid his jaws," Mr Wong wrote.
When Mr Wong called campus security, he was told there were "maybe three [foxes], and one of them is the mum, they think".
Although none of the bitten students needed stitches or surgery, they each had to pay $300 for the tetanus shot..
Mr Wong wrote that "the pain wasn't in the [tetanus] jab … it was the $300 medical bill."
Sydney Fox and Dingo Rescue volunteer Lara Schilling told UNSW student newspaper The Newsworthy that foxes should be avoided, as they can be aggressive when provoked.
"Foxes generally avoid humans in the wild, but urban foxes have this bada** kind of curiosity streak, so they might come up to sniff someone and they can bite," she said.
"They're sneaky little jerks sometimes but it's part of their quirks."
UNSW campus authorities are now trying to hunt down the fox and remove it.
In 2014, the New South Wales Government passed an order labelling foxes as pests and making it illegal to keep them as pets, and declaring that abandoned or injured foxes should be euthanised.