Vulnerability Description
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 Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Signalk | Signal K Server | < 2.19.0 |
Related Weaknesses (CWE)
References
- https://github.com/SignalK/signalk-server/releases/tag/v2.19.0Release Notes
- https://github.com/SignalK/signalk-server/security/advisories/GHSA-w3x5-7c4c-66pExploitVendor Advisory
FAQ
What is CVE-2025-66398?
CVE-2025-66398 is a vulnerability with a CVSS score of 9.6 (CRITICAL). 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 ...
How severe is CVE-2025-66398?
CVE-2025-66398 has been rated CRITICAL with a CVSS base score of 9.6/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2025-66398?
Check the references section above for vendor advisories and patch information. Affected products include: Signalk Signal K Server.