What is CVE-2021-47919?

CVE-2021-47919 is a medium-severity vulnerability in Simplephpscripts Simple Cms, classified under Cross-site Scripting. CVSS score: 6.4/10. Published 2026-02-01.

How severe is CVE-2021-47919?

Medium severity. CVSS v3 base score is 6.4 out of 10.

XSS in Simplephpscripts Simple Cms

CVE-2021-47919

Simple CMS 2.1 contains a non-persistent cross-site scripting vulnerability in the preview.php file's id parameter. Attackers can inject malicious script code through a GET request to execute arbitrary scripts and potentially hijack user sessions or perform phishing attacks.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.003 (21.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N.

Affected products

Simplephpscripts Simple Cms — versions 2.1
Simplephpscripts Simple_cms_php — versions 2.1

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

disclosure@vulncheck.com (Exploit, Third Party Advisory, exploit)
disclosure@vulncheck.com (Product, product)
disclosure@vulncheck.com (Third Party Advisory, third-party-advisory)

Frequently asked questions

What is CVE-2021-47919?: CVE-2021-47919 is a medium-severity vulnerability in Simplephpscripts Simple Cms, classified under Cross-site Scripting. CVSS score: 6.4/10. Published 2026-02-01.
How severe is CVE-2021-47919?: Medium severity. CVSS v3 base score is 6.4 out of 10.