. ▁The ▁company ▁used ▁an ▁un enc rypted ▁database ▁to ▁store ▁user ▁account ▁data , ▁including ▁plain text ▁passwords ▁( as ▁opposed ▁to ▁password ▁hash es ) ▁for ▁its ▁service , ▁as ▁well ▁as ▁passwords ▁to ▁connected ▁accounts ▁at ▁partner ▁sites ▁( including ▁Facebook , ▁Mys pace , ▁and ▁web mail ▁services ). ▁Rock You ▁would ▁also ▁e - mail ▁the ▁password ▁un enc rypted ▁to ▁the ▁user ▁during ▁account ▁recovery . ▁They ▁also ▁did ▁not ▁allow ▁using ▁special ▁characters ▁in ▁the ▁passwords . ▁The ▁hack ers ▁used ▁a ▁ 1 0 - year - old ▁SQL ▁vulner ability ▁to ▁gain ▁access ▁to ▁the ▁database . ▁The ▁company ▁took ▁days ▁to ▁notify ▁users ▁after ▁the ▁incident , ▁and ▁initially ▁incorrectly ▁reported ▁that ▁the ▁bre ach ▁only ▁affected ▁older ▁applications ▁when ▁it ▁actually ▁affected ▁all ▁Rock You ▁users . ▁ ▁Z oo ▁World ▁Rock You ' s ▁most ▁played ▁game , ▁Z oo ▁World , ▁is ▁a ▁free ▁social ▁media ▁application ▁where ▁users ▁try ▁to ▁build ▁the ▁best ▁zoo ▁they ▁can . ▁Part icip ants ▁can ▁build ▁on ▁various ▁islands ▁and ▁decor ate ▁their ▁zoo ▁with ▁k ios ks , ▁trees , ▁and ▁a ▁large ▁variety ▁of ▁animals . ▁In ▁addition , ▁it ▁has ▁features ▁such ▁as ▁bre eding ▁animals , ▁collect ing ▁objects , ▁and ▁visit ing ▁friends ' ▁zoo ▁islands . ▁The ▁act ▁of ▁level ing ▁up ▁is ▁based ▁on ▁achiev ements ▁of ▁tasks . ▁Users ▁can ▁also ▁ear n ▁wild life ▁points , ▁a ▁bonus ▁reward ▁that ▁can ▁be ▁used ▁to