I was able to find and join several random @SkypeBusiness meetings today… Step #1: Discover Companies Using Skype intitle:”Skype for Business Web App” “Skype for Business Web App” Step #2: Find Usernames inurl:http://example.com intitle:”skype|lync” Step #3: Bruteforce Meeting IDs Bruteforce meeting IDs to find meetings to join. Exploit is not being released at this time. […]