The Kubernetes kube-apiserver in versions v1.6-v1.15, and versions prior to v1.16.13, v1.17.9 and v1.18.7 are vulnerable to an unvalidated redirect on proxied upgrade requests that could allow an attacker to escalate privileges from a node compromise to a full cluster compromise. CREATE(Triage):(User=admin) [CVE-2020-8559|https://nvd.nist.gov/vuln/detail/CVE-2020-8559]