CVE-2021-47917

6.4 MEDIUM
Published: February 01, 2026 Modified: February 11, 2026
View on NVD

Description

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.

AI Explanation

Get an AI-powered plain-language explanation of this vulnerability and remediation steps.

Login to generate AI explanation

CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
https://simplephpscripts.com/simple-cms-php
Source: disclosure@vulncheck.com
Product
https://www.vulncheck.com/advisories/simple-cms-persistent-cross-site-scripting-via-user-input-parameters
Source: disclosure@vulncheck.com
Third Party Advisory
https://www.vulnerability-lab.com/get_content.php?id=2302
Source: disclosure@vulncheck.com
Exploit Third Party Advisory

3 reference(s) from NVD

Quick Stats

CVSS v3 Score
6.4 / 10.0
EPSS (Exploit Probability)
0.0%
3th percentile
Exploitation Status
Not in CISA KEV

Weaknesses (CWE)

CWE-79

Affected Vendors

simplephpscripts

Related CVEs

CVE-2026-4558 8.8
CVE-2026-4557 4.3
CVE-2026-4555 8.8
CVE-2026-4554 6.3
CVE-2026-33319 5.9