What is CVE-2020-27816?

CVE-2020-27816 is a medium-severity vulnerability in Elastic Kibana, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 6.1/10. Published 2020-12-02.

How severe is CVE-2020-27816?

Medium severity. CVSS v3 base score is 6.1 out of 10.

Open Redirect in Elastic Kibana

CVE-2020-27816

The elasticsearch-operator does not validate the namespace where kibana logging resource is created and due to that it is possible to replace the original openshift-logging console link (kibana console) to different one, created based on the new CR for the new kibana resource. This could lead to an arbitrary URL redirection or the openshift-logging console link damage. This flaw affects elasticsearch-operator-container versions before 4.7.

Vulnerability class: Open Redirect

Published 2020-12-02 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.007 (49.2th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 49th percentile — 49.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000

Affected products

Elastic Kibana
Red Hat Openshift Container Platform — versions 4.0
Openshift-Logging/console — versions Versions before elasticsearch-operator-container 4.7

Weakness classification (CWE)

CWE-601 — URL Redirection to Untrusted Site (Open Redirect)

References

bugzilla.redhat.com/show_bug.cgi (Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2020-27816?: CVE-2020-27816 is a medium-severity vulnerability in Elastic Kibana, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 6.1/10. Published 2020-12-02.
How severe is CVE-2020-27816?: Medium severity. CVSS v3 base score is 6.1 out of 10.