exist version <= 5.0.0-RC4 contains a XML External Entity (XXE) vulnerability in XML Parser for REST Server that can result in Disclosure of confidential data, denial of service, SSRF, port scanning.
CVSS 3.1CRITICAL 10.0·Network·No auth·No interaction·EPSS 0.01879·Published 2018-12-20·Fixed in 5.1.0CWE-611