Luke Moore's 37th-minute strike has levelled the score at 1-1 after an early Jack Midson own goal had given Exeter City the lead at Kingsmeadow.
Matt Grimes, 18, forced Ross Worner into an early save and from the resulting corner the away side took the lead.
Grimes himself took the corner, which struck Wimbledon defender Jack Midson and he inadvertently nodded the ball into his own net.
Jimmy Keohane blasted over from 12 yards a few minutes later as the away team had the better of the early chances.
Artur Krysiak made a smart, low save from Alan Bennett before Callum Kennedy's corner saw a goalmouth scramble and the Polish goalkeeper was forced to come to his side's rescue once more.
However, the hosts did manage to level eight minutes before half time. Charlie Wyke squirmed his way past Scot Bennett and rolled the ball across the six-yard box to leave Moore with a simple tap-in.
