Unrestricted File Upload in kkFileView 4.4.0 Affects Security
CVE-2025-4538

5.3MEDIUM

Key Information:

Vendor

kkFileView

Status
Kkfileview
Vendor
CVE Published:
11 May 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-4538?

A security flaw exists in kkFileView version 4.4.0 that allows unrestricted file uploads through the fileUpload endpoint. This vulnerability enables remote attackers to upload arbitrary files, which may lead to unauthorized operations within the application. Exploitation of this issue has the potential to compromise server security and data integrity. Despite disclosing the vulnerability to the vendor, no response was received regarding remediation efforts. It is crucial for users of this software to implement immediate protective measures.

Affected Version(s)

kkFileView 4.4.0

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-2025-4538 - Proof of Concept

References

https://vuldb.com/?id.308283
vdb-entrytechnical-description
https://vuldb.com/?ctiid.308283
signaturepermissions-required
https://vuldb.com/?submit.566596
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

s0l42 (VulDB User)
.
CVE-2025-4538 : Unrestricted File Upload in kkFileView 4.4.0 Affects Security