CVE-2025-66398
January 01, 2026
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.
Affected Packages
https://github.com/SignalK/signalk-server.git (GITHUB):
Affected version(s) >=dtest <v2.19.0Fix Suggestion:
Update to version v2.19.0signalk-server (NPM):
Affected version(s) >=0.1.24 <2.19.0Fix Suggestion:
Update to version 2.19.0Related Resources (5)
Do you need more information?
Contact UsCVSS v4
Base Score:
9.4
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
PASSIVE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
HIGH
Subsequent System Integrity
HIGH
Subsequent System Availability
HIGH
CVSS v3
Base Score:
9.6
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Weakness Type (CWE)
EPSS
Base Score:
0.08
