by Kastro
Paper/Archive/CVE-2025-66398

CVE-2025-66398

SignalK signalk-server — Signal K Server has Unauthenticated State Pollution leading to Remote Code Execution (RCE)

EPSS 20%public exploitCVSS 9.7
critical.is priorityof 100
59
CVSS 9.7 (CNA)9.7 / 10 × 3029.1Not in CISA KEV+300.0EPSS percentile 97.4.974 × 2019.5Exploit: SSVC poc+1010.0SSVC exploitation: poc+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
signalk-server< 2.19.0–CNA

Scores by source

GitHub_M (CNA)9.7CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
CISA ADPSSVCExploitation: poc · Automatable: yes · Technical impact: total

References

refgithub.com/SignalK/signalk-server/security/advisories/GHSA-w3x5-7c4c-66p9refgithub.com/SignalK/signalk-server/releases/tag/v2.19.0