CVE-2021-47919

MEDIUM 6.4

Simple CMS 2.1 Non-Persistent Cross-Site Scripting via Preview Parameter

CVSS Score

6.4

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-79
Vendor	simplephpscripts
Product	simple cms
Published	Feb 1, 2026
Last Updated	Mar 5, 2026

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CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Affected Versions

Simplephpscripts / Simple CMS

2.1

References

NVD ↗ CVE.org ↗ EPSS Data ↗

vulnerability-lab.com: https://www.vulnerability-lab.com/get_content.php?id=2301 simplephpscripts.com: https://simplephpscripts.com/simple-cms-php vulncheck.com: https://www.vulncheck.com/advisories/simple-cms-non-persistent-cross-site-scripting-via-preview-parameter

Credits

Vulnerability-Lab [Research Team]