CVE-2020-8559 — Vulnetix

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CVE-2020-8559 REJECTED

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.

EPSS 51.20% · 97.9th percentile

Risk Scores

EPSS Score

51.20%

97.9th percentile

Affected Products

Vendor	Product	Versions
Ubuntu:24.04:LTS	kubernetes	0, 1.0
Ubuntu:Pro:20.04:LTS	kubernetes	1.0, 0
Ubuntu:22.04:LTS	kubernetes	0, 1.0

Timeline

CVE Published
Oct 30, 2020 PoC Published
Apr 14, 2021 EPSS Score
Feb 4, 2022 EPSS Score
Mar 17, 2025 EPSS Score
Mar 19, 2025 EPSS Score
Mar 27, 2025 EPSS Score
Mar 28, 2025 EPSS Score
Mar 30, 2025 EPSS Score
Apr 13, 2025 EPSS Score
May 1, 2025 EPSS Score
May 4, 2025 EPSS Score

References

https://ubuntu.com/security/CVE-2020-8559 third-party-advisory
https://www.openwall.com/lists/oss-security/2020/07/15/6 third-party-advisory
https://www.cve.org/CVERecord?id=CVE-2020-8559 third-party-advisory

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