We released Doorkeeper 5.4.0 with polymorphic resource owner support, additional authorization hooks improvements, new features and bugfixes!

Also this release (as well as 5.0.3, 5.1.1, 5.2.5 and 5.3.2) contains security fix for CVE-2020-10187.

Don't forget to check upgrade guides because there were some breaking changes to fix inconveniences with OAuth RFC. If we forgot something - please report us, we appreciate your help <3

Stay tuned and good luck!