Non-Persistent Cross-Site Scripting Vulnerability in Simple CMS by Simple PHP Scripts
CVE-2021-47919

5.1MEDIUM

Key Information:

Vendor

SimplePHPscripts

Status
Simple Cms
Vendor
CVE Published:
1 February 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2021-47919?

The Simple CMS 2.1 version is subject to a non-persistent cross-site scripting (XSS) vulnerability that allows attackers to inject malicious scripts via the 'id' parameter in the preview.php file. This exploitation occurs through a simple GET request, enabling the execution of arbitrary scripts that could lead to session hijacking or phishing attacks. Users of Simple CMS should take immediate precautions, including applying security patches and filtering user input.

Human OS v1.0:
Ageing Is an Unpatched Zero-Day Vulnerability.

Remediate biological technical debt. Prime Ageing uses 95% high-purity SIRT6 activation to maintain genomic integrity and bolster systemic resilience.

Deploy the Patch

Affected Version(s)

Simple CMS 2.1

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2021-47919 - Proof of Concept

References

https://www.vulnerability-lab.com/get_content.php?id=2301
exploit
https://simplephpscripts.com/simple-cms-php
product
https://www.vulncheck.com/advisories/simple-cms-non-persi...
third-party-advisory

CVSS V4

Score:
5.1
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Vulnerability-Lab [Research Team]
JSON
.