A vulnerability was found in OIDC-Client. When using the RH SSO OIDC adapter with EAP 7.x or when using the elytron-oidc-client subsystem with EAP 8.x, authorization code injection attacks can occur, allowing an attacker to inject a stolen authorization code into the attacker's own session with the client with a victim's identity. This is usually done with a Man-in-the-Middle (MitM) or phishing attack.
https://github.com/wildfly-security/wildfly-elytron/pull/2261
https://github.com/wildfly-security/wildfly-elytron/pull/2253
https://github.com/wildfly-security/wildfly-elytron/commit/d7754f5a6a91ceb0f4dbbbfe301991f6a55404cb
https://github.com/wildfly-security/wildfly-elytron/commit/5ac5e6bbcba58883b3cebb2ddbcec4de140c5ceb
https://bugzilla.redhat.com/show_bug.cgi?id=2331178