Vulnerability · Published Nov 26, 2025 · Assigned by Gridware

CVE-2025-66253Unauthenticated OS Command Injection (start_upgrade.php)

Critical 9.9

In plain English

A critical-severity OS command injection in Mozart FM Transmitter from DB Electronica Telecomunicazioni S.p.A.. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 2.3% (higher than 83% of all known vulnerabilities).

Severity (CVSS 4.0)9.9Critical

Exploit odds (30 days)2.3%top 16.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

Unauthenticated OS Command Injection (start_upgrade.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 User input passed directly to exec() allows remote code execution via start_upgrade.php. The `/var/tdf/start_upgrade.php` endpoint passes user-controlled `$_GET["filename"]` directly into `exec()` without sanitization or shell escaping. Attackers can inject arbitrary shell commands using metacharacters (`;`, `|`, etc.) to achieve remote code execution as the web server user (likely root).

Affected products (as reported)

Vendor	Product	Versions
DB Electronica Telecomunicazioni S.p.A.	Mozart FM Transmitter	3050100300500100020003000

Weakness: CWE-78 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N

References

https://www.abdulmhsblog.com/posts/webfmvulns/ exploit, technical-description