Which versions of PHP are affected by CVE-2025-66255?

Organizations using DB Electronica Telecomunicazioni S.p.A. Mozart FM Transmitter face critical risk from CVE-2025-66255 rated CVSS 9.9.

Is there a public PoC exploit available for CVE-2025-66255?

Yes, a public proof-of-concept exploit is available for CVE-2025-66255. Prioritise patching immediately. EPSS: 0.3%.

How to fix or mitigate CVE-2025-66255?

Within 24 hours: Identify all affected systems running DB Electronica Telecomunicazioni S.p.A. Mozart FM Transmitte and apply vendor patches immediately. Monitor vendor channels for patch availability.

PHP CVE-2025-66255

Q: What is the CVSS score of CVE-2025-66255?

CVE-2025-66255 has a CVSS 4.0 base score of 9.9 (Critical). CVSS vector: 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:X/V:X/RE:X/U:X. EPSS exploitation probability: 0.3%.

CRITICAL

Insufficient Verification of Data Authenticity (CWE-345)

2025-11-26 b7efe717-a805-47cf-8e9a-921fca0ce0ce

9.9

CVSS 4.0 · NVD

Severity by source

NVD PRIMARY

9.9 CRITICAL

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:X/V:X/RE:X/U:X

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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:X/V:X/RE:X/U:X

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 19:24 vuln.today

PoC Detected

Dec 03, 2025 - 16:48 vuln.today

Public exploit code

CVE Published

Nov 26, 2025 - 01:16 nvd

CRITICAL 9.9

DescriptionCVE.org

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

AnalysisAI

Unauthenticated Arbitrary File Upload (upgrade_contents.php) in DB Electronica Telecomunicazioni S.p.A. Rated critical severity (CVSS 9.9), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.

Technical ContextAI

This vulnerability is classified under CWE-345. 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 Affected products include: Dbbroadcast Mozart Next 3000 Firmware, Dbbroadcast Mozart Next 3500 Firmware, Dbbroadcast Mozart Next 50 Firmware, Dbbroadcast Mozart Next 500 Firmware, Dbbroadcast Mozart Next 6000 Firmware.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.