Server-side request forgery (SSRF) vulnerability in the proxy endpoint (api/v1/proxy) in Apache Ambari before 2.1.0 allows remote authenticated users to conduct port scans and access unsecured services via a crafted REST call.
https://github.com/advisories/GHSA-9g2j-5685-h44h
https://cwiki.apache.org/confluence/display/AMBARI/Ambari+Vulnerabilities