Non-Persistent Cross-Site Scripting in PHP Melody by PHP Melody
CVE-2021-47912

5.1MEDIUM

Key Information:

Vendor

PHPsugar

Status
PHP Melody
Vendor
CVE Published:
1 February 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2021-47912?

PHP Melody version 3.0 is vulnerable to multiple non-persistent cross-site scripting (XSS) attacks, particularly within the categories, import, and user import functionalities. Attackers can exploit these vulnerabilities by injecting malicious scripts through unvalidated parameters. This can lead to client-side attacks, potentially allowing attackers to hijack user sessions and compromise sensitive user data.

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Affected Version(s)

PHP Melody 3.0

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-2021-47912 - Proof of Concept

References

https://www.vulnerability-lab.com/get_content.php?id=2290
exploit
https://www.phpsugar.com/blog/2021/09/php-melody-3-0-vuln...
patch
https://www.phpsugar.com/phpmelody.html
product

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]
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