[Tex/LaTex] List of Figures and List of Tables do not show fancyhdr

I'm currently writing my Bachelor's Thesis and have already used LateX for several documents and reports so far. However, I cam across a problem during formatting my thesis. Throughout my whole work I want to use fancyhdr which gives me a horizontal line in the header of each page with the page numbering on the right upper corner (my thesis will be printed onesided).
Everything works fine besides the page numbering of my LOF and LOT. There the page numbering is on the bottom page in the middle (the default setting I think). After those two pages the page numbering is according to my wishes again.

\documentclass[a4paper,12pt]{scrartcl}
\usepackage{tocloft}
\usepackage[english]{babel}
\usepackage{titlesec}
\usepackage{fancyhdr}
\pagestyle{fancy}
\fancyhf{}
\begin{document}
\end{document}
\listoffigures
\newpage
\listoftables
\newpage


What could possibly be the problem?

It is not recommanded to use titlesec, tocloft or fancyhdr together with a KOMA-Script class. Here is a suggestion using scrlayer-scrpage:

\documentclass[a4paper,12pt,
]{scrartcl}
\usepackage[english]{babel}
\usepackage{blindtext}
\clearpairofpagestyles

\begin{document}
\tableofcontents
\clearpage
\listoffigures
\clearpage
\listoftables
\clearpage
\blinddocument
\end{document}


Note that package tocloft destroys the features of option listof. Additionally you have to define a matching plain style:

\documentclass[a4paper,12pt]{scrartcl}
\usepackage[english]{babel}
\usepackage{blindtext}
\clearpairofpagestyles

\usepackage{tocloft}

\begin{document}
\tableofcontents
\cleardoublepage
\listoffigures
\cleardoublepage
\listoftables
\clearpage
\blinddocument
\end{document}


Or you have to set \tocloftpagestyle{scrheadings}:

\documentclass[a4paper,12pt]{scrartcl}
\usepackage[english]{babel}
\usepackage{blindtext}
\clearpairofpagestyles

\usepackage{tocloft}

\begin{document}
\tableofcontents
\cleardoublepage