Unrestricted File Upload Vulnerability in MaxSite CMS Software
CVE-2025-12346

5.3MEDIUM

Key Information:

Vendor

Maxsite

Status
Cms
Vendor
CVE Published:
28 October 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-12346?

A severe vulnerability in MaxSite CMS versions up to 109 allows attackers to exploit the HTTP Header Handler component through manipulation of the X-Requested-FileName and X-Requested-FileUpDir parameters. This flaw enables unauthorized file uploads, resulting in arbitrary remote file execution and potential server compromise. The exploit has been made public, raising significant risks for users of the affected versions. Early attempts to contact the vendor regarding this issue went unanswered, highlighting the urgency of addressing this security gap.

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-2025-12346 - Proof of Concept

References

https://vuldb.com/?id.330136
vdb-entrytechnical-description
https://vuldb.com/?ctiid.330136
signaturepermissions-required
https://vuldb.com/?submit.674551
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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