CVE-2020-8555

Name: CVE-2020-8555
Creator: NVD / NIST
Published: 2020-06-05T17:15:11.64+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.3/10EPSS 3.68%

Last modified Jun 17, 2026

CVE-2020-8555 is a medium-severity vulnerability rated 6.3/10 on the CVSS scale. The Kubernetes kube-controller-manager in versions v1.0-1.14, versions prior to v1.15.12, v1.16.9, v1.17.5, and version v1.18.0 are vulnerable to a Server Side Request Forgery (SSRF) that allows certain authorized users to leak up to 500 bytes of arbitrary information from unprotected endpoints within the master's host network (such as link-local or loopback services).. EPSS estimates a 3.68% chance of exploitation in the next 30 days.

Description

The Kubernetes kube-controller-manager in versions v1.0-1.14, versions prior to v1.15.12, v1.16.9, v1.17.5, and version v1.18.0 are vulnerable to a Server Side Request Forgery (SSRF) that allows certain authorized users to leak up to 500 bytes of arbitrary information from unprotected endpoints within the master's host network (such as link-local or loopback services).

Metrics

CVSS 3.1

6.3/10

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N

EPSS Probability

3.68%

88.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Kubernetes	Kubernetes	< 1.15.11
Kubernetes	Kubernetes	>= 1.16.0, < 1.16.9
Kubernetes	Kubernetes	>= 1.17.0, < 1.17.5
Kubernetes	Kubernetes	1.18.0
Fedoraproject	Fedora	32

References

http://www.openwall.com/lists/oss-security/2020/06/01/4Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/05/04/8Mailing List, Third Party Advisory
https://github.com/kubernetes/kubernetes/issues/91542Third Party Advisory
https://groups.google.com/d/topic/kubernetes-security-announce/kEK27tqqs30/discussionMailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3SOCLOPTSYABTE4CLTSPDIFE6ZZZR4LX/
https://security.netapp.com/advisory/ntap-20200724-0005/Third Party Advisory
http://www.openwall.com/lists/oss-security/2020/06/01/4Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/05/04/8Mailing List, Third Party Advisory
https://github.com/kubernetes/kubernetes/issues/91542Third Party Advisory
https://groups.google.com/d/topic/kubernetes-security-announce/kEK27tqqs30/discussionMailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3SOCLOPTSYABTE4CLTSPDIFE6ZZZR4LX/
https://security.netapp.com/advisory/ntap-20200724-0005/Third Party Advisory

Timeline

Published: Jun 5, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-8555?

How severe is CVE-2020-8555?

CVE-2020-8555 has a CVSS score of 6.3/10 (MEDIUM severity). The EPSS model estimates a 3.68% probability of exploitation in the next 30 days.

How do I fix CVE-2020-8555?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-8555?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST