CVE-2025-66255 - CVE House
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Status published Critical CVE-2025-66255

Unauthenticated Arbitrary File Upload (upgrade_contents.php)

Vulnerability 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

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

  • Abdul Mhanni

References

More from DB Electronica Telecomunicazioni S.p.A.

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CVE-2025-66263
Unauthenticated Arbitrary File Read via Null Byte Injection
High 8.9
CVE-2025-66262
Arbitrary File Overwrite via Tar Extraction Path Traversal
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CVE-2025-66261
Unauthenticated OS Command Injection (restore_settings.php)
Critical 9.9
CVE-2025-66260
PostgreSQL SQL Injection (status_sql.php)
High 7.2
CVE-2025-66259
Authenticated Root Remote Code Execution through improper filtering of HTTP post request parameters
Critical 9.3

Affected Vendor

DB Electronica Telecomunicazioni S.p.A.

View all reports →

Affected Software

Mozart FM Transmitter
Vulnerable Versions:
30, 50, 100, 300, 500, 1000, 2000, 3000, 3500, 6000, 7000

Timeline

Official Publish: November 26th, 2025
Last Modified: December 3rd, 2025
Added to House: July 22nd, 2026

CVSS Vectors

Weaknesses (CWE)

CWE-345

MITRE ATT&CK TTPs

T1557 Adversary-in-the-Middle
Credential Access
T1071 Application Layer Protocol
Command and Control
T1552 Unsecured Credentials
Credential Access
T1190 Exploit Public-Facing Application
Initial Access
T1041 Exfiltration Over C2 Channel
Exfiltration