Redmine

People would update the embedded page, which is also embedded in other pages, and by such update every of these embedding pages at once without any clue of what they're doing, it feels like potentially destructive to me.

Etienne Massip wrote:

People would update the embedded page, which is also embedded in other pages, and by such update every of these embedding pages at once without any clue of what they're doing, it feels like potentially destructive to me.

As long as it adheres to the permission system, it should work fine.