A flaw was found in JBoss EAP. When an OIDC app that serves multiple tenants attempts to access the second tenant, it should prompt the user to log in again since the second tenant is secured with a different OIDC configuration. The underlying issue is in OidcSessionTokenStore when determining if a cached token should be used or not. This logic needs to be updated to take into account the new provider-url option in addition to the realm option.
The product does not sufficiently verify the origin or authenticity of data, in a way that causes it to accept invalid data.