Unrestricted File Upload Vulnerability in YiFang CMS Affects Versions Up to 2.0.5
CVE-2025-9400

5.3MEDIUM

Key Information:

Vendor

Yifang

Status
Cms
Vendor
CVE Published:
25 August 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-9400?

A vulnerability was identified in YiFang CMS versions up to 2.0.5, specifically in the mergeMultipartUpload function found in app/utils/base/plugin/P_file.php. This vulnerability allows attackers to manipulate file upload arguments, leading to unrestricted file upload capability. This opens the door for remote attackers to exploit the application, potentially compromising the server. Despite early notifications, the vendor has yet to address this security issue, making it critical for users to apply necessary security measures and updates to protect their systems.

Affected Version(s)

CMS 2.0.0

CMS 2.0.1

CMS 2.0.2

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-2025-9400 - Proof of Concept

References

https://vuldb.com/?id.321236
vdb-entrytechnical-description
https://vuldb.com/?ctiid.321236
signaturepermissions-required
https://vuldb.com/?submit.632535
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

Yu Bao (VulDB User)
.
CVE-2025-9400 : Unrestricted File Upload Vulnerability in YiFang CMS Affects Versions Up to 2.0.5