Goals from Jamie Cureton and John O'Flynn secured Exeter their first home win since 18 September against struggling AFC Wimbledon.
O'Flynn appeared to be caught by both Will Antwi and Yado Mambo in the box but no penalty was given.
The Grecians eventually went ahead when Alan Gow supplied Cureton, who fired in to the top corner.
Curtis Osano's shot deflected over the crossbar for the Dons before O'Flynn slotted home with ease.
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