What’s Vulnerable › Vulnerabilities

CVE-2021-47919: Simple CMS 2.1 Non-Persistent Cross-Site Scripting via Preview Parameter

• Severity: medium (CVSS 5.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-02-01 · updated 2026-06-17
• Weakness: CWE-79

Description

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.

Affected products

• Simplephpscripts Simple CMS: 2.1

References

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

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