Insufficient capability checks in some grade reports resulted in some hidden grades being available to users who did not have permission to view them. Versions affected: 4.5 to 4.5.2, 4.4 to 4.4.6, 4.3 to 4.3.10, 4.1 to 4.1.16 and earlier unsupported versions Versions fixed: 4.5.3, 4.4.7, 4.3.11 and 4.1.17