CVE-2025-66398

critical · 9.6

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.

9.6

CVSS

20.1%

EPSS (exploit prob.)

97th

EPSS percentile

2026-01-01

Published

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

Weaknesses

CWE-78CWE-913

Affected products

Vendor	Product	Affected versions
signalk	signal_k_server	< 2.19.0

Check a specific version with /api/v1/cve/match.

References

https://github.com/SignalK/signalk-server/releases/tag/v2.19.0
https://github.com/SignalK/signalk-server/security/advisories/GHSA-w3x5-7c4c-66p9

Query this programmatically:

curl https://evil-db.io/api/v1/cve/CVE-2025-66398