Unauthenticated File Upload Vulnerability in DB Electronica Mozart FM Transmitter
CVE-2025-66256

9.9CRITICAL

Key Information:

Vendor

Db Electronica Telecomunicazioni S.p.a.

Status
Mozart Fm Transmitter
Vendor
CVE Published:
26 November 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-66256?

The Mozart FM Transmitter from DB Electronica Telecomunicazioni S.p.A. is exposed to an unauthenticated arbitrary file upload vulnerability via the patch_contents.php endpoint. This vulnerability allows attackers to upload any type of file without proper server-side validation, posing a significant risk. The absence of file type enforcement, MIME type checking, and file size restrictions (beyond 16MB) creates avenues for malicious entities to upload harmful files that can compromise system integrity and security.

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Affected Version(s)

Mozart FM Transmitter 30

Mozart FM Transmitter 50

Mozart FM Transmitter 100

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-2025-66256 - Proof of Concept

References

https://www.abdulmhsblog.com/posts/webfmvulns/
exploittechnical-description

CVSS V4

Score:
9.9
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
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

Abdul Mhanni
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