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.
Scoring
- Severity
- CRITICAL
- CVSS base score
- 9.7
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
- EPSS probability
- 20.13%
- CWE
- CWE-78, CWE-913
- Published
- 2026-01-01
- Last modified
- 2026-03-13
Affected products
- SignalK signalk-server
Weakness type
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