Unrestricted File Upload Vulnerability in MaxSite CMS by MaxSite
CVE-2025-12347

5.3MEDIUM

Key Information:

Vendor

Maxsite

Status
Cms
Vendor
CVE Published:
28 October 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-12347?

A vulnerability has been identified in MaxSite CMS versions up to 109 that allows an attacker to execute remote exploitation through the file application/maxsite/admin/plugins/editor_files/save-file-ajax.php. By manipulating the file_path/content argument, an attacker can perform unrestricted file uploads onto the server. This may lead to various malicious actions, including the potential execution of arbitrary code and unauthorized access to sensitive information. Despite early notification to the vendor regarding this flaw, there has been no response, elevating concerns over user security and the necessity for immediate action.

Affected Version(s)

CMS 109

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-2025-12347 - Proof of Concept

References

https://vuldb.com/?id.330137
vdb-entrytechnical-description
https://vuldb.com/?ctiid.330137
signaturepermissions-required
https://vuldb.com/?submit.674552
third-party-advisory

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
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

V3geD4g (VulDB User)
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CVE-2025-12347 : Unrestricted File Upload Vulnerability in MaxSite CMS by MaxSite