The first time I've used a virtual box was to test an exe file which I suspected to be a virus and didn't want to run it directly on my computer and I liked it so much that I use it ever since. Lately though I have learned that virtual boxes also have their own vulnerabilities so I had to check out if there are any virtualization security news. I am happy I looked for more details though, because now I can continue using my virtual box without any fear.