/usr/include/KF5/ksieveui/ is in libkf5ksieve-dev 4:17.12.3-0ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/KF5/ksieveui/abstractmoveimapfolderwidget.h
/usr/include/KF5/ksieveui/abstractregexpeditorlineedit.h
/usr/include/KF5/ksieveui/checkscriptjob.h
/usr/include/KF5/ksieveui/ksieveui_export.h
/usr/include/KF5/ksieveui/managesievescriptsdialog.h
/usr/include/KF5/ksieveui/managesievetreeview.h
/usr/include/KF5/ksieveui/managesievewidget.h
/usr/include/KF5/ksieveui/multiimapvacationdialog.h
/usr/include/KF5/ksieveui/multiimapvacationmanager.h
/usr/include/KF5/ksieveui/renamescriptjob.h
/usr/include/KF5/ksieveui/sievedebugdialog.h
/usr/include/KF5/ksieveui/sieveeditor.h
/usr/include/KF5/ksieveui/sieveeditorwidget.h
/usr/include/KF5/ksieveui/sieveimapaccountsettings.h
/usr/include/KF5/ksieveui/sieveimapinstance.h
/usr/include/KF5/ksieveui/sieveimapinstanceinterface.h
/usr/include/KF5/ksieveui/sieveimapinstanceinterfacemanager.h
/usr/include/KF5/ksieveui/sieveimappasswordprovider.h
/usr/include/KF5/ksieveui/sievetreewidgetitem.h
/usr/include/KF5/ksieveui/util.h
/usr/include/KF5/ksieveui/util_p.h
/usr/include/KF5/ksieveui/vacationmanager.h