What is CVE-2018-20476?

CVE-2018-20476 is a medium-severity vulnerability in S-Cms, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2018-12-26.

How severe is CVE-2018-20476?

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

XSS in S-Cms

CVE-2018-20476

An issue was discovered in S-CMS 3.0. It allows XSS via the admin/demo.php T_id parameter.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2018-12-26 · 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: 0.007 (50.2th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 50th percentile — 50.2% 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

S-Cms — versions 3.0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

shell01.top/2018/12/14/scms-xss/ (URL Repurposed, Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2018-20476?: CVE-2018-20476 is a medium-severity vulnerability in S-Cms, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2018-12-26.
How severe is CVE-2018-20476?: Medium severity. CVSS v3 base score is 6.1 out of 10.