Police have appealed for witnesses to the assault which happened at about 1am on October 30.
The attack happened next to the Duke of York pub on Market Street.
A spokesman for West Mercia police said: "Two men attacked a man in an alleyway by the Duke of York pub. He suffered stab wounds and was treated for minor injuries."
"Anyone who saw anything please visit orlo.uk/5mr5L quoting ref 128 of October 30."
