CVE-2020-8559
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…
Does this matter?
Lower severity and a low EPSS score (6.10%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 6.8 MEDIUMCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H
- EPSS
- 6.10% probability · 93th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-601
- Affected
- kubernetes/kubernetes
- Source
- jordan@liggitt.net
EPSS 6.1% since 26 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://github.com/kubernetes/kubernetes/issues/92914Exploit, Issue Tracking, Patch, Third Party Advisory
- https://groups.google.com/d/msg/kubernetes-security-announce/JAIGG5yNROs/19nHQ5wkBwAJExploit, Third Party Advisory
- https://security.netapp.com/advisory/ntap-20200810-0004/Third Party Advisory
- https://github.com/kubernetes/kubernetes/issues/92914Exploit, Issue Tracking, Patch, Third Party Advisory
- https://groups.google.com/d/msg/kubernetes-security-announce/JAIGG5yNROs/19nHQ5wkBwAJExploit, Third Party Advisory
- https://security.netapp.com/advisory/ntap-20200810-0004/Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.