Vulnerability record · CVE-2021-47917 · published 1 February 2026

CVE-2021-47917: Simplephpscripts simple cms php cross-site scripting vulnerability

Simplephpscripts · Simple Cms Php

Simple CMS 2.1 contains a persistent cross-site scripting vulnerability in user input parameters that allows remote attackers to inject malicious script code. Attackers can exploit the newUser and editUser modules to inject persistent scripts that execute on user list preview, potentially leading to session hijacking and application manipulation.

5.1 CVSS 4.0 Medium EPSS 0.31% · top 78.9% CWE-79 · Cross-site scripting

5.1CVSS 4.0 base score

0.31%EPSS exploitation probability, 30 days

NoNot in CISA KEV

1Affected product versions listed by NVD

3References, 1 tagged exploit

17 Jun 2026Last modified by NVD

Description

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:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

Simple Cms Php Simplephpscripts

References

Link	Tags
https://simplephpscripts.com/simple-cms-php	Product
https://www.vulncheck.com/advisories/simple-cms-persistent-cross-site-scripting-via-user-input-parameters	Third Party Advisory
https://www.vulnerability-lab.com/get_content.php?id=2302	ExploitThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2021-47917), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.