Two goals early in the second half saw Barnsley overturn a 1-0 deficit to claim a League One win at Exeter and end their six-match winless run in all competitions.
Exeter made a strong start to the game with Jack Aitchison dragging a shot wide of goal inside the opening 20 seconds.
The Grecians were rewarded for their bright start after 13 minutes when Caleb Watts was fouled a yard outside the 18-yard box and Josh Magennis' drilled free-kick took a big deflection before nestling in the net.
The Tykes rarely threatened in the opening half but they did have one good chance when Davis Keillor-Dunn was played through on goal, but Joe Whitworth was out quickly to make a superb save, while Caleb Watts blazed an equally-good chance over the crossbar for Exeter.
Barnsley levelled four minutes into the second half when the hosts struggled to clear their lines and Kelechi Nwakali smashed a fine low shot past the unsighted Whitworth from 25 yards.
The Tykes went in front after 58 minutes when Stephen Humphreys drilled a superb low cross into the box and Keillor-Dunn had the simplest of tap-ins.
Exeter almost levelled in stoppage time, but substitute Jay Bird saw his effort go straight at Ben Killip as the Tykes held on for the win.
Report supplied by PA Media.