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How the CVE Works
CVE-2025-4538 is a critical vulnerability in kkFileView 4.4.0 that allows unrestricted file uploads via the `/fileUpload` endpoint. Attackers can remotely exploit this flaw by manipulating the `File` parameter to upload malicious files, leading to potential remote code execution (RCE) or server compromise. The lack of proper file validation and authentication checks enables attackers to abuse this functionality. Publicly disclosed exploits increase the risk of widespread attacks.
DailyCVE Form
Platform: kkFileView
Version: 4.4.0
Vulnerability: Unrestricted Upload
Severity: Critical
Date: 06/16/2025
Prediction: Patch expected by 07/20/2025
What Undercode Say
Analytics:
curl -X POST http://target/fileUpload -F "[email protected]"
requests.post("http://target/fileUpload", files={"file": open("exploit.php", "rb")})
How Exploit:
- Remote file upload
- Bypass file checks
- Execute malicious payload
Protection from this CVE
- Disable `/fileUpload`
– Implement file validation - Update to patched version
Impact:
- Remote code execution
- Server takeover
- Data compromise
Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
Undercode
