What is CVE-2018-20698?

CVE-2018-20698 is a medium-severity vulnerability in Search-Guard Search Guard, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 6.1/10. Published 2019-04-09.

How severe is CVE-2018-20698?

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

Open Redirect in Search-Guard Search Guard

CVE-2018-20698

The floragunn Search Guard plugin before 6.x-16 for Kibana allows URL injection for login redirects on the login page when basePath is set.

Vulnerability class: Open Redirect

Published 2019-04-09 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.008 (54.9th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 55th percentile — 54.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000

Affected products

Search-Guard Search Guard

Weakness classification (CWE)

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

References

docs.search-guard.com/latest/changelog-kibana-6.x-16 (Patch, Vendor Advisory)
github.com/floragunncom/search-guard-kibana-plugin/pull/140 (Third Party Advisory)

Frequently asked questions

What is CVE-2018-20698?: CVE-2018-20698 is a medium-severity vulnerability in Search-Guard Search Guard, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 6.1/10. Published 2019-04-09.
How severe is CVE-2018-20698?: Medium severity. CVSS v3 base score is 6.1 out of 10.