Network security

Hi all,
I have been reading some topics and info on Kodi since my house guest told me about it. In researching I’ve found its an open ended app with the potential for security breaches and it’s advised to use a VPN. My question is, if my guest is using my wifi to use Kodi on his personal laptop, am I also at risk?
Thanks so much for any insight, seems like an awesome app but I am really not I to risking my personal info.