VULNERABILITY INTELLIGENCE

CVE-2020-8559

CVSS score6.4 MEDIUM

EPSS probability6.10%

CISA KEVNot currently listed

Published2020-07-22

Last modified2026-06-17

CVSS vectorCVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H

Description

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.

Weakness classification

jordan@liggitt.net: CWE-601
nvd@nist.gov: CWE-601

Primary references

jordan@liggitt.net — Exploit, Issue Tracking, Patch, Third Party Advisory
jordan@liggitt.net — Exploit, Third Party Advisory
jordan@liggitt.net — Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 — Exploit, Issue Tracking, Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 — Exploit, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 — Third Party Advisory