"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.'"

References

• https://nvd.nist.gov/vuln/detail/CVE-2017-18924
• oauthjs/node-oauth2-server#637
• oauthjs/node-oauth2-server#452
• https://codeburst.io/missing-the-point-in-securing-oauth-2-0-83968708b467
• https://tools.ietf.org/html/draft-ietf-oauth-security-topics-15
• https://tools.ietf.org/html/rfc7636