CVE-2021-47917

Simple CMS 2.1 Persistent Cross-Site Scripting via User Input Parameters

Published Feb 1, 2026 CVSS 4.0 · 5.1 Medium EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Simple-cms Project
Simple-cms Project simple Cms
CPEs cpe:2.3:a:simple-cms_project:simple_cms:2.1:*:*:*:*:*:*:*
Vendors & Products Simple-cms Project
Simple-cms Project simple Cms
Type Values Removed Values Added
First Time appeared Simplephpscripts simple Cms Php
CPEs cpe:2.3:a:simplephpscripts:simple_cms_php:2.1:*:*:*:*:*:*:*
Vendors & Products Simplephpscripts simple Cms Php
Type Values Removed Values Added
First Time appeared Simplephpscripts
Simplephpscripts simple Cms
Vendors & Products Simplephpscripts
Simplephpscripts simple Cms
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title Simple CMS 2.1 Persistent Cross-Site Scripting via User Input Parameters
Weaknesses CWE-79
References
Metrics cvssV3_1

{'score': 6.4, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N'}

cvssV4_0

{'score': 5.1, 'vector': '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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulnCheck
Published
Updated
Mar 5, 2026, 1:29 AM
Reserved
Feb 1, 2026, 11:24 AM
Status
Analyzed
Published
Feb 1, 2026, 1:15 PM
Modified
Jun 17, 2026, 4:18 AM