Fixes #15182 - limit user taxonomies in API (CVE-2016-4451)
(cherry picked from commit 1144040f444b4bf4aae81940a150b26b23b4623c)
Fixes #15182 - limit user taxonomies in API (CVE-2016-4451)
(cherry picked from commit 1144040f444b4bf4aae81940a150b26b23b4623c)