Remote Code Execution Vulnerability in SitemagicCMS by Sitemagic
CVE-2023-53921

8.7HIGH

Key Information:

Vendor

Sitemagic

Status
Sitemagiccms
Vendor
CVE Published:
17 December 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2023-53921?

SitemagicCMS version 4.4.3 is susceptible to a remote code execution vulnerability due to an unrestricted file upload mechanism. This flaw allows attackers to upload malicious PHP files, particularly .phar files, into the files/images directory of the web application. Once uploaded, these files can execute arbitrary system commands, posing significant risks to the integrity and security of the system. Proper validation of file uploads is essential to safeguard against unauthorized code execution.

Affected Version(s)

SitemagicCMS 4.4.3

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-2023-53921 - Proof of Concept

References

https://www.exploit-db.com/exploits/51464
exploit
https://sitemagic.org/Download.html
product
https://www.vulncheck.com/advisories/sitemagiccms-remote-...
third-party-advisory

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
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

Mirabbas Ağalarov
JSON
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CVE-2023-53921 : Remote Code Execution Vulnerability in SitemagicCMS by Sitemagic