Today, Microsoft published an advisory on CVE-2019-0624 on a spoofing vulnerability in Skype for Business 2015. It requires a few steps of the attacker and isn’t entirely straightforward to execute. They must be an authenticated user and then send a spoofed request that can then perform a XSS on the victim machine at the privilege level of the user using Skype for Business.
Article Link: https://isc.sans.edu/diary/rss/24540