CVE-2021-47917 - CVE House
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Status published Medium CVE-2021-47917

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

Vulnerability 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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

  • Vulnerability-Lab [Research Team]

Affected Vendor

Simplephpscripts

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Affected Software

Simple CMS
Vulnerable Versions:
2.1

Timeline

Official Publish: February 1st, 2026
Last Modified: March 5th, 2026
Added to House: July 21st, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

Weaknesses (CWE)