A reflected XSS on a user page was detected on one of the JetBrains TeamCity pages. The issue was fixed in TeamCity 2018.2.2.
https://euvd.enisa.europa.eu/vulnerability/EUVD-2019-4422
https://blog.jetbrains.com/blog/2019/06/19/jetbrains-security-bulletin-q1-2019/