While this vulnerability is significant, Oracle EBS should not be exposed to the internet due to the nature of the service and the sensitivity of the data housed within it.
Oracle have made articles in the past to describe deployments that are internet facing and relying upon Oracle WAF for protection, which is not best practice. This is directly contradicted by the official deployment documentation. The documentation acknowledges that this should not be exposed to the internet, and if it needs to be a bastion host should be used to access the instance (scenario 3).
Disappointingly, the UK's NCSC also mistakenly links to the poor quality article over the deployment documentation.
Our recommendation remains the same, Oracle EBS should not be exposed to the internet. Intruder's scanners report an attack surface risk as an issue if this panel is exposed.