Recently, a vulnerability has been disclosed by Vectra that affects Microsoft Teams, the very popular communication tool used daily by millions of people (me too). Security researchers found that Teams stores session tokens in clear text on the file system. I won’t discuss the vulnerability here; read the blog post if you want to learn more. The critical element is that once the token has been stolen, an attacker can impersonate the user.
Article Link: InfoSec Handlers Diary Blog - SANS Internet Storm Center