Retrieve epics from one project that are tied to multiple user stories across different projects

[KE]

I'm looking for a JQL query or Dashboard gadget to find all the epics from one project/board tied to various user-stories, defects, non-development tickets from different projects/boards.

For example:
Project XYZ has an EPIC - 1234
Project ABC, DEF, GHI have user stories tied to that EPIC - 1234

I just need to retrieve all the epics from XYZ Project tied to issues from Projects ABC, DEF,GHI.

Thank you.

[Mikael Sandberg]

You cannot create a nested query needed to get the result that you are looking for without using an app that extends JQL with a function that can do that. I know from experience that both Scriptrunner/Enhanced Search and JQL Tricks can do this, but you should also look at some of the other apps in the marketplace that can do this.

[KE]

It is not allowed to download third party tools on our network. Appreciate your response, Mikael.