How to use latest version of Mosekin CVX is addressed in How to speed up CVX for sparse, low-rank matrix recovery - #2 by Mark_L_Stone .
To set Mosek MIP absolute gap optimality tolerance to 0;05 and MIP relative gap optimality tolerance to 1% when Mosek is called from CVX
cvx_solver_settings('MSK_DPAR_MIO_TOL_ABS_GAP',0.05,'MSK_DPAR_MIO_TOL_REL_GAP',0.01)
Chnage the specified tolerance as desired.