Code Injection found by npm audit

[Lior Kaminsky]

From npm audit output:
oauth2-server (aka node-oauth2-server) through 3.1.1 implements OAuth 2.0 without PKCE. It does not prevent authorization code injection. This is similar to CVE-2020-7692. NOTE: the vendor states 'As RFC7636 is an extension, I think the claim in the Readme of "RFC 6749 compliant" is valid and not misleading and I also therefore wouldn't describe this as a "vulnerability" with the library per se.'"

[oded baruch]

Indeed Urgent

[Daniel Reguero]

The project appears to have been abandoned for over a year or so, but there are MRs and issues made to address these.

#452

#637

Hopefully if someone of us can get this under new management (or if they come back) these issues can addressed.