HTML Injection Vulnerability in CSZ CMS by CSZ
CVE-2021-47737

5.1MEDIUM

Key Information:

Vendor

Cszcms

Status
Csz Cms
Vendor
CVE Published:
23 December 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2021-47737?

CSZ CMS version 1.2.7 is vulnerable to an HTML injection flaw, enabling authenticated users to inject malicious hyperlinks into message titles. This vulnerability can be exploited by attackers through crafted POST requests to the member messaging system, potentially facilitating phishing or social engineering attacks that compromise user data and integrity.

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Affected Version(s)

CSZ CMS 1.2.7

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-2021-47737 - Proof of Concept

References

https://www.exploit-db.com/exploits/48357
exploit
https://www.cszcms.com/
product
https://sourceforge.net/projects/cszcms/
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

Metin Yunus Kandemir
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