What is CVE-2018-20137?

CVE-2018-20137 is a medium-severity vulnerability in Thedaylightstudio Fuel Cms, classified under Cross-site Scripting. CVSS score: 4.8/10. Published 2018-12-13.

How severe is CVE-2018-20137?

Medium severity. CVSS v3 base score is 4.8 out of 10.

XSS in Thedaylightstudio Fuel Cms

CVE-2018-20137

XSS exists in FUEL CMS 1.4.3 via the Page title, Meta description, or Meta keywords during page data management, as demonstrated by the pages/edit/1?lang=english URI.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2018-12-13 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.8 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.006 (44.4th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 44th percentile — 44.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

Thedaylightstudio Fuel Cms — versions 1.4.3

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

github.com/CCCCCrash/POCs/tree/master/Web/fuel-cms/xss1 (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2018-20137?: CVE-2018-20137 is a medium-severity vulnerability in Thedaylightstudio Fuel Cms, classified under Cross-site Scripting. CVSS score: 4.8/10. Published 2018-12-13.
How severe is CVE-2018-20137?: Medium severity. CVSS v3 base score is 4.8 out of 10.