CVE-2025-66398

Signal K Server is a server application that runs on a central hub in a boat. Prior to version 2.19.0, an unauthenticated attacker can pollute the internal state (`restoreFilePath`) of the server via the `/skServer/validateBackup` endpoint. This allows the attacker to hijack the administrator's "Restore" functionality to overwrite critical server configuration files (e.g., `security.json`, `package.json`), leading to account takeover and Remote Code Execution (RCE). Version 2.19.0 patches this vulnerability.

CVSS v3 9.6 CRITICAL

9.6^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 2.8 / Impact : 6.0

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope CHANGED

References

Link	Resource
https://github.com/SignalK/signalk-server/releases/tag/v2.19.0	Release Notes
https://github.com/SignalK/signalk-server/security/advisories/GHSA-w3x5-7c4c-66p9	Exploit Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:signalk:signal_k_server:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-01-01 18:15

Updated : 2026-01-06 18:34

NVD link : CVE-2025-66398

Mitre link : CVE-2025-66398

CVE.ORG link : CVE-2025-66398

JSON object : View

Products Affected

signalk

signal_k_server

CWE

CWE-78

Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

CWE-913

Improper Control of Dynamically-Managed Code Resources

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