Signalk: community verdicts

1 notable / known-exploited Signalk CVE the community has triaged.

ⓘ Not an exhaustive list: we focus on the findings that matter (exploited / notable). For every Signalk CVE, see NVD ↗.

Exploitation first, with newly exploited CVEs rising above old ones

CVE-2025-66398CRIT 9.6EPSS 20%
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.