Unauthenticated Arbitrary File Upload Vulnerability in DB Electronica Telecomunicazioni Mozart FM Transmitter
CVE-2025-66255

9.9CRITICAL

Key Information:

Vendor

Db Electronica Telecomunicazioni S.p.a.

Status
Mozart Fm Transmitter
Vendor
CVE Published:
26 November 2025

Badges

👾 Exploit Exists

What is CVE-2025-66255?

The Mozart FM Transmitter from DB Electronica Telecomunicazioni contains a vulnerability in the 'upgrade_contents.php' endpoint, which allows unauthenticated users to upload arbitrary files. This flaw stems from a lack of validation for file headers and cryptographic signatures, combined with the absence of enforced .tgz file format requirements. As a result, attackers can exploit this vulnerability to inject malicious firmware packages, potentially leading to remote code execution on affected devices.

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Affected Version(s)

Mozart FM Transmitter 30

Mozart FM Transmitter 50

Mozart FM Transmitter 100

References

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

CVSS V4

Score:
9.9
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
None
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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