"The Zoom video conferencing app contains two big security issues for Mac users. First, uninstalling the app the regular way doesn’t actually remove it from your system; instead, by installing Zoom, you’ve actually installed a persistent web server on your system that can be used to reinstall the app without your permission.
Why is that a problem? Because an attacker can then send you an invite link to a meeting—embedded in a website, or even an email—which launches Zoom (even if you “removed” it). This joins you into a conference call and, by default, your webcam is on, which could create some awkward moments depending on what you’re up to."