Unrestricted File Upload Vulnerability in Youkefu by Zhangyanbo2007
CVE-2025-4258

5.3MEDIUM

Key Information:

Vendor

Zhangyanbo2007

Status
Youkefu
Vendor
CVE Published:
5 May 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-4258?

A significant vulnerability identified in Youkefu by Zhangyanbo2007 allows for unrestricted file uploads through the MediaController.java file. Specifically, the vulnerable function, Upload, accepts a manipulated imgFile argument, permitting remote attackers to upload malicious files. This exploit is publicly disclosed, making it imperative for users to apply necessary mitigations to protect their systems.

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Affected Version(s)

youkefu 4.0

youkefu 4.1

youkefu 4.2.0

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-2025-4258 - Proof of Concept

References

https://vuldb.com/?id.307362
vdb-entrytechnical-description
https://vuldb.com/?ctiid.307362
signaturepermissions-required
https://vuldb.com/?submit.562848
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

Fc04dB (VulDB User)
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