File Upload Vulnerability in Phpwcms by PhpWCMS
CVE-2021-47783

5.3MEDIUM

Key Information:

Vendor

PHPwcms

Status
PHPwcms
Vendor
CVE Published:
15 January 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2021-47783?

Phpwcms version 1.9.30 has a vulnerability that permits authenticated users to upload malicious SVG files containing embedded JavaScript through its multiple file upload feature. This can lead to potential cross-site scripting (XSS) attacks, enabling attackers to execute arbitrary scripts in the context of the application and potentially compromise the integrity of the platform.

Affected Version(s)

Phpwcms 1.9.30

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-2021-47783 - Proof of Concept

References

https://www.exploit-db.com/exploits/50363
exploit
http://www.phpwcms.org/
product
https://www.vulncheck.com/advisories/phpwcms-arbitrary-fi...
third-party-advisory

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Okan Kurtulus
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