CVE-2025-66398 | THREATINT

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.

PUBLISHED Reserved 2025-11-28 | Published 2026-01-01 | Updated 2026-01-05 | Assigner GitHub_M

CRITICAL: 9.7CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

Problem types

CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

CWE-913: Improper Control of Dynamically-Managed Code Resources

Product status

< 2.19.0

affected

References

github.com/...server/security/advisories/GHSA-w3x5-7c4c-66p9

github.com/SignalK/signalk-server/releases/tag/v2.19.0

cve.org (CVE-2025-66398)

nvd.nist.gov (CVE-2025-66398)

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