In JetBrains IntelliJ IDEA 2019.2, an XSLT debugger plugin misconfiguration allows arbitrary file read operations over the network. This issue was fixed in 2019.3.
https://euvd.enisa.europa.eu/vulnerability/EUVD-2020-28846
https://blog.jetbrains.com/blog/2020/01/24/jetbrains-security-bulletin-q4-2019/