CVE-2025-66398HIGH 8.8EPSS p96.8%

CVE-2025-66398CVE-2025-66398

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.

Scoring

CVSS 3.18.8 (HIGH)
VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS17.93% probability of exploitation · percentile 96.8% · 2026-06-19T12:03:05Z
Published2026-01-01
Last modified2026-01-06

Underlying weaknesses· 2

CWE-78CWE-913

References

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

2

TypeTargetConfidenceTier
WeaknessImproper Neutralization of Special Elements used in an OS Command ('OS Command Injection')cwe-780%live
WeaknessImproper Control of Dynamically-Managed Code Resourcescwe-9130%live

Related by meaning· 6

Nearest entities by semantic similarity across the cs-graph corpus.

CVE
CVE-2026-33950
CVE
CVE-2026-23515
CVE
CVE-2025-68620
CVE
CVE-2025-69203
CVE
CVE-2025-62630
CVE
CVE-2025-49199
Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.