CVE-2020-8561

mediumpriority · track · 17EPSS 0.021 · 82 %ileDEEUFRRUUS
grimoire priorityP3 · Track
Exploitable?
—
no known exploitation
Likely / severe?
2.10% (82nd) EPSS
CVSS 4 · medium
Is it mine?
12 products
Check your exposure
Who says so?
7 sources
cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-27

A security issue was discovered in Kubernetes where actors that control the responses of MutatingWebhookConfiguration or ValidatingWebhookConfiguration requests are able to redirect kube-apiserver requests to private networks of the apiserver. If that user can view kube-apiserver logs when the log level is set to 10, they can view the redirected responses and headers in the logs.

01

cvss

Technical severity, 0–10. One row per scoring source.

4.1
010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–medium · 3.8–4.1

v2.04mediumAV:N/AC:L/Au:S/C:P/I:N/A:Nprimary · NVD / NIST USexploitability 8 · impact 2.9
v3.14.1mediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:N/A:Nprimary · NVD / NIST USexploitability 2.3 · impact 1.4
v3.14.1mediumAV:N/AC:L/PR:H/UI:N/S:C/C:L/I:N/A:Nsecondary · FSTEC (BDU) RU
v3.14.1mediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:N/A:Nsecondary · ENISA EU
v3.14.1mediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:N/A:Nsecondary · jordan@liggitt.netexploitability 2.3 · impact 1.4
v3.14.1mediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:N/A:Nsecondary · OSV
v3.13.8lowCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:N/A:N/E:Usecondary · CVSS-BT (t0sche)
02

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-610USprimaryCWE-441USCWE-441USCWE-610USCWE-610US
03

affected products (12)

Products and version ranges known to be affected.

04

advisories (3)

Vendor and ecosystem advisories describing this.

  • WID-SEC-W-2026-2596Kubernetes: Mehrere SchwachstellenDeutsch2021-09-15csaf · cert_bundDE

    Ein entfernter, authentisierter Angreifer kann mehrere Schwachstellen in Kubernetes ausnutzen, um Informationen offenzulegen und Sicherheitsmaßnahmen zu umgehen.

  • GHSA-74j8-88mm-7496Confused Deputy in Kubernetes2021-09-21ghsa · osvUS

    A security issue was discovered in Kubernetes where actors that control the responses of MutatingWebhookConfiguration or ValidatingWebhookConfiguration requests are able to redirect kube-apiserver requests to private networks of the apiserver. If that user can view kube-apiserver logs when the log level is set to 10, they can view the redirected responses and headers in the logs.

  • CERTFR-2026-AVI-1385Multiples vulnérabilités dans les produits VMwareFrançais2026-10-26vendor · certfrFR
05

also known as (4)

Other names and identifiers for this entity.

06

sources

Which sources assert this record, and when.

cnnvdenisa_euvdfstec_bducert_bundnvdosvcertfrNVDCVE.orgMITRE
published 2021-09-20modified 2026-06-17
08

references (15)

External citations — patches, advisories, analysis.

scry

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