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Fencer Vulns
medium 6.1

CVE-2020-27816 json

The elasticsearch-operator does not validate the namespace where kibana logging resource is created and due to that it is possible to repla…

published 2020-12-02 5 y ago modified 2026-06-17 4 mo ago also EUVD-2020-20317

cvss
6.1
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.7%
EPSS 0.7% chance of exploitation in 30 days, percentile 51%
public exploits
0
none known

Summary

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.

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2020-27816 updated cvss 6.1

openshift/elasticsearch-operator: arbitrary URL redirection of the cluster logging kibana console

  • Red Hat OpenShift Container Platform 4.6 openshift4/ose-elasticsearch-operator v4.6.0-202101300140.p0
    fixed: vendor fix RHSA-2021:0310
  • Red Hat OpenShift Container Platform 4.6 openshift4/ose-ptp v4.6.0-202101300140.p0, openshift4/ose-sriov-cni v4.6.0-202101300140.p0, openshift4/ose-ghostunnel v4.6.0-202101300140.p0, openshift4/ose-descheduler v4.6.0-202101300140.p0, openshift4/ose-ptp-operator v4.6.0-202101300140.p0, openshift4/ose-egress-router v4.6.0-202101300140.p0, +39 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

0.65% chance of exploitation in the next 30 days, higher than 51% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
NVD 2.0 5.8 AV:N/AC:M/Au:N/C:P/I:P/A:N

Affected products

  • n/a openshift-logging/console

Classification

Weakness
  • CWE-601 URL Redirection to Untrusted Site

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.