What is CVE-2020-8563?

CVE-2020-8563 is a medium-severity vulnerability in Kubernetes, classified under Insertion of Sensitive Information into Log File. CVSS score: 4.7/10. Published 2020-12-07.

How severe is CVE-2020-8563?

Medium severity. CVSS v3 base score is 4.7 out of 10.

Information disclosure in Kubernetes

CVE-2020-8563

In Kubernetes clusters using VSphere as a cloud provider, with a logging level set to 4 or above, VSphere cloud credentials will be leaked in the cloud controller manager's log. This affects < v1.19.3.

Published 2020-12-07 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.7 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.005 (41.3th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 41st percentile — 41.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: +0.000

Affected products

Kubernetes — versions < 1.19.3

Weakness classification (CWE)

CWE-532 — Insertion of Sensitive Information into Log File

References

github.com/kubernetes/kubernetes/issues/95621 (Third Party Advisory)
groups.google.com/g/kubernetes-security-discuss/c/vm-HcrFUOCs/m/36utxAM5CwAJ (mailing-list, Patch, Mailing List, Third Party Advisory)
security.netapp.com/advisory/ntap-20210122-0006/ (Third Party Advisory)

Frequently asked questions

What is CVE-2020-8563?: CVE-2020-8563 is a medium-severity vulnerability in Kubernetes, classified under Insertion of Sensitive Information into Log File. CVSS score: 4.7/10. Published 2020-12-07.
How severe is CVE-2020-8563?: Medium severity. CVSS v3 base score is 4.7 out of 10.