Unauthenticated file upload via client-side-only validation
Published Nov 26, 2025 · Updated Nov 26, 2025
Unrestricted file upload in DB Elettronica Mozart FM Transmitter allows remote attackers to write arbitrary files without authentication. The status_contents.php handler checks only a 30,000-byte size limit before moving the temporary upload under its attacker-chosen name into /var/www/settings; file-type validation exists only in client-side JavaScript. Any remote client that can reach the management interface can place an arbitrary file in that directory, but the disclosed flaw alone does not establish code execution.
Summary
What happened
Unrestricted file upload in DB Elettronica Mozart FM Transmitter allows remote attackers to write arbitrary files without authentication. The status_contents.php handler checks only a 30,000-byte size limit before moving the temporary upload under its attacker-chosen name into /var/www/settings; file-type validation exists only in client-side JavaScript. Any remote client that can reach the management interface can place an arbitrary file in that directory, but the disclosed flaw alone does not establish code execution.
The record
- CVE
- CVE-2025-66250
- Published
- Nov 26, 2025
- Updated
- Nov 26, 2025
- Vendor
- DB Elettronica Telecomunicazioni S.p.A.
- Product
- Mozart FM Transmitter
- Classifications
- CWE-434, CAPEC-100, T1190
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Nov 26, 2025CVE publishedPublication date reported by the CVE source.
- Nov 26, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=100
- Affected versionversion=1000
- Affected versionversion=2000
- Affected versionversion=30
- Affected versionversion=300
- Affected versionversion=3000
- Affected versionversion=3500
- Affected versionversion=50
- Affected versionversion=500
- Affected versionversion=6000
- Affected versionversion=7000
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- status_contents.php unrestricted-upload technical proofproof of concept · unverified
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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