In JetBrains TeamCity between 2024.03 and 2024.03.1 several stored XSS in the available updates page were possible
In JetBrains TeamCity before 2024.03 reflected XSS was possible via Space connection configuration
JetBrains YouTrack 2019.2 before 2019.2.59309 was vulnerable to XSS via an issue description.
In versions of the @theia/plugin-ext component of Eclipse Theia prior to 1.18.0, Webview contents can be hijacked via postMessage().