The first half exploded into life with two goals in the final six minutes as Webster for the home side cancelled out Bauza's opener for the Cobblers.
No further goals were scored to leave Northampton two points above their hosts and five ahead of Barnet in the final relegation place with the Cobblers and the Bees having six games left to play and the Brewers holding two games in hand.
Gary Johnson continues his quest for a first win as manager when promotion chasing Bury come to Sixfields on Saturday.