onyx

onyx --cves cve-2020-8559

CVE-2020-8559

MEDPOCKubernetes
score
<0.1
cvss
6.4
epss
6.1%
published
2020-07-22
kev added
—
first seen

Kubernetes kube-apiserver versions v1.6-v1.15, prior to v1.16.13, v1.17.9, and v1.18.6 contain an unvalidated redirect caused by unvalidated upgrade requests, letting attackers escalate privileges from node compromise to full cluster compromise, exploit requires node compromise.

Timeline

How this CVE moved toward exploitation. Chart: last 30 days — trend score, EPSS, community mentions per day; hover the event lane.

events2020-07-22 — PublishedP2026-10-21 — Tracked by OnyxT2026-10-21 — Public PoCXscore2026-10-21: score <0.1<0.1epss2026-09-22: epss 6.1%2026-09-23: epss 6.1%2026-09-24: epss 6.1%2026-09-25: epss 6.1%2026-09-26: epss 6.1%2026-09-27: epss 6.1%2026-09-28: epss 6.1%2026-09-29: epss 6.1%2026-09-30: epss 6.1%2026-10-01: epss 6.1%2026-10-02: epss 6.1%2026-10-03: epss 6.1%2026-10-04: epss 6.1%2026-10-05: epss 6.1%2026-10-06: epss 6.1%2026-10-07: epss 6.1%2026-10-08: epss 6.1%2026-10-09: epss 6.1%2026-10-10: epss 6.1%2026-10-11: epss 6.1%2026-10-12: epss 6.1%2026-10-13: epss 6.1%2026-10-14: epss 6.1%2026-10-15: epss 6.1%2026-10-16: epss 6.1%2026-10-18: epss 6.1%2026-10-19: epss 6.1%2026-10-20: epss 6.1%2026-10-21: epss 6.1%6.1%mentions/day0no mentions in 30 days2026-09-22today
  1. Published
  2. Tracked by Onyx
  3. Public PoC

Exploit availability

Public PoC flagged by vulnx; no direct exploit link among the citations.

Weaknesses

CWE-601

References 3