@gio I found a theme that isn't broken but Hugo throws errors when building the content.

ERROR: 2018/08/11 12:25:52 general.go:222: Error while rendering section wordpress: template: theme/_default/list.html:6:5: executing "theme/_default/list.html" at <.Summary>: Summary is not a field of struct type *hugolib.Node

I guess WordPress to Hugo Exporter created some junk.