Vulnerability DatabaseCVE-2020-8559
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CVE-2020-8559
Published:July 22, 2020
Updated:May 16, 2026
The Kubernetes kube-apiserver in versions v1.6-v1.15, and versions prior to v1.16.13, v1.17.9 and v1.18.6 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.
Affected Packages
k8s.io/apimachinery (GO):
Affected version(s) >=v0.0.0-20170111180949-a1e35b736404 <v0.16.13
Fix Suggestion:
Update to version v0.16.13
k8s.io/kubernetes (GO):
Affected version(s) >=v1.17.0 <v1.17.9
Fix Suggestion:
Update to version v1.17.9
k8s.io/apimachinery (GO):
Affected version(s) >=v0.17.0 <v0.17.9
Fix Suggestion:
Update to version v0.17.9
k8s.io/kubernetes (GO):
Affected version(s) >=v1.18.0 <v1.18.7
Fix Suggestion:
Update to version v1.18.7
k8s.io/kubernetes (GO):
Affected version(s) >=v0.0.0-20150129005104-7e134cb73dfe <v1.16.13
Fix Suggestion:
Update to version v1.16.13
Related Resources (11)
https://bugzilla.redhat.com/show_bug.cgi?id=1851422
https://nvd.nist.gov/vuln/detail/CVE-2020-8559
https://github.com/tdwyer/CVE-2020-8559
https://security.netapp.com/advisory/ntap-20200810-0004/
https://github.com/advisories/GHSA-33c5-9fx5-fvjm
https://github.com/kubernetes/kubernetes
https://security.netapp.com/advisory/ntap-20200810-0004
https://groups.google.com/g/kubernetes-security-announce/c/JAIGG5yNROs
https://groups.google.com/d/msg/kubernetes-security-announce/JAIGG5yNROs/19nHQ5wkBwAJ
https://github.com/kubernetes/kubernetes/issues/92914
https://github.com/kubernetes/kubernetes/pull/92941
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CVSS v4
Base Score:
7.3
Attack Vector
NETWORK
Attack Complexity
HIGH
Attack Requirements
NONE
Privileges Required
HIGH
User Interaction
PASSIVE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
6.4
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
HIGH
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Weakness Type (CWE)
URL Redirection to Untrusted Site ('Open Redirect')
CWE-601
EPSS
Base Score:
51.20