I would always defer to Paizo as it should be the first hand source.
Interestingly Archives of Nethys lists it as [curse] too. My (old) hardcopy of the CRB doesn't. I can't find a relevant FAQ. I'm baffled as to where both AoN and PFSRD got the [curse] tag from. I'm sure someone will point out the blindingly obvious that I've missed though.