CVE-2021-47919

Name: CVE-2021-47919
Creator: NVD / NIST
Published: 2026-02-01T13:15:56.403+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.1/10EPSS 0.29%

Last modified Jun 17, 2026

CVE-2021-47919 is a medium-severity vulnerability rated 5.1/10 on the CVSS scale. 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.. EPSS estimates a 0.29% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

5.4/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

CVSS 4.0

5.1/10

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Probability

0.29%

20.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Simplephpscripts	Simple Cms Php	2.1

References

https://simplephpscripts.com/simple-cms-phpProduct
https://www.vulncheck.com/advisories/simple-cms-non-persistent-cross-site-scripting-via-preview-parameterThird Party Advisory
https://www.vulnerability-lab.com/get_content.php?id=2301Exploit, Third Party Advisory

Timeline

Published: Feb 1, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2021-47919?

How severe is CVE-2021-47919?

CVE-2021-47919 has a CVSS score of 5.1/10 (MEDIUM severity). The EPSS model estimates a 0.29% probability of exploitation in the next 30 days.

How do I fix CVE-2021-47919?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-47919?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST