CVE-2025-66263

Nov. 26, 2025, 1:16 a.m.

8.9
High

Description

Unauthenticated Arbitrary File Read via Null Byte Injection 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 Null byte injection in download_setting.php allows reading arbitrary files. The `/var/tdf/download_setting.php` endpoint constructs file paths by concatenating user-controlled `$_GET['filename']` with a forced `.tgz` extension. Running on PHP 5.3.2 (pre-5.3.4), the application is vulnerable to null byte injection (%00), allowing attackers to bypass the extension restriction and traverse paths. By requesting `filename=../../../../etc/passwd%00`, the underlying C functions treat the null byte as a string terminator, ignoring the appended `.tgz` and enabling unauthenticated arbitrary file disclosure of any file readable by the web server user.

Product(s) Impacted

Vendor Product Versions
Db Electronica Telecomunicazioni
  • Mozart Fm Transmitter
  • 30, 50, 100, 300, 500, 1000, 2000, 3000, 3500, 6000, 7000

Weaknesses

Common security weaknesses mapped to this vulnerability.

CWE-158
Improper Neutralization of Null Byte or NUL Character
The product receives input from an upstream component, but it does not neutralize or incorrectly neutralizes NUL characters or null bytes when they are sent to a downstream component.

*CPE(s)

Affected systems and software identified for this CVE.

Type Vendor Product Version Update Edition Language Software Edition Target Software Target Hardware Other Information
a db_electronica_telecomunicazioni mozart_fm_transmitter 30 / / / / / / /
a db_electronica_telecomunicazioni mozart_fm_transmitter 50 / / / / / / /
a db_electronica_telecomunicazioni mozart_fm_transmitter 100 / / / / / / /
a db_electronica_telecomunicazioni mozart_fm_transmitter 300 / / / / / / /
a db_electronica_telecomunicazioni mozart_fm_transmitter 500 / / / / / / /
a db_electronica_telecomunicazioni mozart_fm_transmitter 1000 / / / / / / /
a db_electronica_telecomunicazioni mozart_fm_transmitter 2000 / / / / / / /
a db_electronica_telecomunicazioni mozart_fm_transmitter 3000 / / / / / / /
a db_electronica_telecomunicazioni mozart_fm_transmitter 3500 / / / / / / /
a db_electronica_telecomunicazioni mozart_fm_transmitter 6000 / / / / / / /
a db_electronica_telecomunicazioni mozart_fm_transmitter 7000 / / / / / / /

References

https://www.abdulmhsblog.com/posts/webfmvulns/

Tags

CWE-158
b7efe717-a805-47cf-8e9a-921fca0ce0ce
2025-11-26
CVE-2025-66263

CVSS Score

8.9 / 10

CVSS Data - 4.0

  • Attack Vector: NETWORK
  • Attack Complexity: LOW
  • Attack Requirements: PRESENT
  • Privileges Required: NONE
  • User Interaction: NONE
  • Scope:
  • Confidentiality Impact: HIGH
  • Integrity Impact: NONE
  • Availability Impact: NONE
  • Exploit Maturity: NOT_DEFINED

    • CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/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

    View Vector String

Timeline

Published: Nov. 26, 2025, 1:16 a.m.
Last Modified: Nov. 26, 2025, 1:16 a.m.

Status : Received

CVE has been recently published to the CVE List and has been received by the NVD.

More info

Source

b7efe717-a805-47cf-8e9a-921fca0ce0ce

*Disclaimer: Some vulnerabilities do not have an associated CPE. To enhance the data, we use AI to infer CPEs based on CVE details. This is an automated process and might not always be accurate.