CVE-2025-66255
CriticalSummary
An unauthenticated attacker can upload arbitrary files to the upgrade_contents.php endpoint in Mozart FM Transmitter. Missing signature validation allows malicious firmware injection, potentially leading to remote code execution.
Risk Assessment
Risk of full device compromise, potentially disrupting broadcasts or enabling further network attacks.
Recommendation
Immediately restrict access to the upgrade_contents.php endpoint and enforce cryptographic signature and file format validation.
Original NVD description (English source)
Unauthenticated Arbitrary File Upload (upgrade_contents.php) in DB Electronica Telecomunicazioni S.p.A. Mozart FM Transmitter versions 30, 50, 100, 300, 500, 1000, 2000, 3000, 3500, 6000, 7000 allows an attacker to perform Missing signature validation allows uploading malicious firmware packages. The firmware upgrade endpoint in `upgrade_contents.php` accepts arbitrary file uploads without validating file headers, cryptographic signatures, or enforcing .tgz format requirements, allowing malicious firmware injection. This endpoint also subsequently provides ways for arbitrary file uploads and subsequent remote code execution