Insufficient checks meant users could see users tagged with a tag, regardless of whether they had access to view the users' profiles. Versions affected: 4.5, 4.4 to 4.4.4, 4.3 to 4.3.8, 4.1 to 4.1.14 and earlier unsupported versions Versions fixed: 4.5.1, 4.4.5, 4.3.9 and 4.1.15