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Vulnerability record · CVE-2025-66255 · published 26 November 2025

CVE-2025-66255: Dbbroadcast mozart next 3000 firmware insufficient verification of data authenticity vulnerability

Dbbroadcast · Mozart Next 3000 Firmware

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

9.9 CVSS 4.0 Critical EPSS 0.38% · top 70.7% CWE-345 · Insufficient verification of data authenticityCWE-434 · Unrestricted file upload
9.9CVSS 4.0 base score
0.38%EPSS exploitation probability, 30 days
NoNot in CISA KEV
22Affected product versions listed by NVD
2References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

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

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:H/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

22 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://www.abdulmhsblog.com/posts/webfmvulns/ ExploitThird Party Advisory
https://www.abdulmhsblog.com/posts/webfmvulns/ ExploitThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.9CVE-2025-66261Dbbroadcast mozart next 100 firmware os command injection vulnerabilityUnauthenticated OS Command Injection (restore_settings.php) in DB Electronica Telecomunicazioni S.p.A. Mozart FM Transmitter versions 30, 50, 100, 30…EPSS 2.3%9.9CVE-2025-66253Dbbroadcast mozart next 100 firmware os command injection vulnerabilityUnauthenticated OS Command Injection (start_upgrade.php) in DB Electronica Telecomunicazioni S.p.A. Mozart FM Transmitter versions 30, 50, 100, 300, …EPSS 2.3%9.9CVE-2025-66256Dbbroadcast mozart next 100 firmware unrestricted file upload vulnerabilityUnauthenticated Arbitrary File Upload (patch_contents.php) in DB Electronica Telecomunicazioni S.p.A. Mozart FM Transmitter versions 30, 50, 100, 300…EPSS 0.44%9.8CVE-2025-63228Dbbroadcast mozart next 100 firmware unrestricted file upload vulnerabilityThe Mozart FM Transmitter web management interface on version WEBMOZZI-00287, contains an unauthenticated file upload vulnerability in the /upload_fi…EPSS 0.76%9.3CVE-2025-66259Dbbroadcast mozart next 100 firmware improper input validation vulnerabilityAuthenticated Root Remote Code Execution via improrer user input filtering in DB Electronica Telecomunicazioni S.p.A. Mozart FM Transmitter versions …EPSS 0.66%9.3CVE-2025-66262Dbbroadcast mozart next 100 firmware path traversal vulnerabilityArbitrary File Overwrite via Tar Extraction Path Traversal in DB Electronica Telecomunicazioni S.p.A. Mozart FM Transmitter versions 30, 50, 100, 300…EPSS 1.4%9.2CVE-2025-66257Dbbroadcast mozart next 100 firmware vulnerabilityUnauthenticated Arbitrary File Deletion (patch_contents.php) in DB Electronica Telecomunicazioni S.p.A. Mozart FM Transmitter versions 30, 50, 100, 3…EPSS 0.38%9.2CVE-2025-66250Dbbroadcast mozart next 100 firmware unrestricted file upload vulnerabilityUnauthenticated Arbitrary File Upload (status_contents.php) in DB Electronica Telecomunicazioni S.p.A. Mozart FM Transmitter versions 30, 50, 100, 30…EPSS 0.44%

Source: NIST National Vulnerability Database (record CVE-2025-66255), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.