What is CVE-2018-3818?

CVE-2018-3818 is a medium-severity vulnerability in Elastic Kibana, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2018-03-30.

How severe is CVE-2018-3818?

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

XSS in Elastic Kibana

CVE-2018-3818

Kibana versions 5.1.1 to 6.1.2 and 5.6.6 had a cross-site scripting (XSS) vulnerability via the colored fields formatter that could allow an attacker to obtain sensitive information from or perform destructive actions on behalf of other Kibana users.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2018-03-30 · 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: 0.010 (62.3th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 62nd percentile — 62.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: -0.000

Affected products

Elastic Kibana — versions 5.1.1 to 6.1.2 and 5.6.6

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

discuss.elastic.co/t/elastic-stack-6-1-2-and-5-6-6-security-update/115763 (Vendor Advisory)
www.securityfocus.com/bid/102734 (VDB Entry, Third Party Advisory, vdb-entry)

Frequently asked questions

What is CVE-2018-3818?: CVE-2018-3818 is a medium-severity vulnerability in Elastic Kibana, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2018-03-30.
How severe is CVE-2018-3818?: Medium severity. CVSS v3 base score is 6.1 out of 10.