CVE intelligence and bounded remediation

CVE-2025-25504 — Niceforyou Gefen Webfwc security vulnerability

Medium CVSS 6.5

An issue in the /usr/local/bin/jncs.sh script of Gefen WebFWC (In AV over IP products) v1.85h, v1.86v, and v1.70 allows attackers with network access to connect to the device over TCP port 4444 without authentication and execute arbitrary commands with root privileges.

Severity
Medium
CVSS
6.5 (3.1)
Published
2025-05-05
CISA KEV
Not currently listed
Ecosystem
software/application
Weaknesses
CWE-77, CWE-287

Affected products

  • niceforyou / gefen_webfwc / 1.70v
  • niceforyou / gefen_webfwc / 1.85h
  • niceforyou / gefen_webfwc / 1.86v

Matched remediation archetype

Command, code, expression, and template injection

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Check exposure

  • Trace untrusted values to process execution, interpreters, evaluators, template engines, dynamic imports, and administrative scripting features.
  • Determine whether the affected path is reachable across each trust boundary and which service account or host privilege it inherits.
  • Review configuration for optional execution features, unsafe compatibility modes, and shell invocation.

Remediate safely

  • Replace string-built commands or evaluated code with fixed operations and structured argument APIs that do not invoke a shell.
  • Use strict allowlists for operation identifiers and reject unexpected input before it reaches any interpreter.
  • Update the affected component and add inert regression tests covering metacharacters, encoding variants, and alternate request paths.

Authoritative sources

Complete CVE record and remediation plan

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