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CVE-2025-66398— Signal K Server has Unauthenticated State Pollution leading to Remote Code Execution (RCE)

Quick assessment

Affected
SignalK signalk-server
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Signal K Server是Signal K开源的一个船用中央服务器。 Signal K Server 2.19.0之前版本存在安全漏洞，该漏洞源于未经验证的攻击者可污染服务器内部状态，可能导致账户接管和远程代码执行。

CVSS 9.7 · Critical EPSS 19.85% · P97
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I. Basic Information for CVE-2025-66398

Vulnerability Information
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Vulnerability Title
Signal K Server has Unauthenticated State Pollution leading to Remote Code Execution (RCE)
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
OS命令中使用的特殊元素转义处理不恰当(OS命令注入)
Source: CVE Program / CVE List V5
Vulnerability Title
Signal K Server 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Signal K Server是Signal K开源的一个船用中央服务器。 Signal K Server 2.19.0之前版本存在安全漏洞，该漏洞源于未经验证的攻击者可污染服务器内部状态，可能导致账户接管和远程代码执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

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Affected Products

Vendor Product Affected Versions CPE Subscribe
SignalK signalk-server < 2.19.0 -

II. Public POCs for CVE-2025-66398

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 8728 chars
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III. Intelligence Information for CVE-2025-66398

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Vendor Advisories for CVE-2025-66398 (1)

Other References for CVE-2025-66398 (1)

Same Patch Batch · SignalK · 2026-01-01 · 6 CVEs total

CVE-2025-68620 9.1 CRITICAL Signal K Server vulnerable to JWT Token Theft via WebSocket Enumeration and Unauthenticate
CVE-2025-68272 7.5 HIGH Signal K Server Vulnerable to Denial of Service via Unrestricted Access Request Flooding
CVE-2025-69203 6.3 MEDIUM Signal K Server Vulnerable to Access Request Spoofing
CVE-2025-68273 5.3 MEDIUM Signal K Server Vulnerable to Unauthenticated Information Disclosure via Exposed Endpoints
CVE-2025-68619 Signal K Server Vulnerable to Remote Code Execution via Malicious npm Package

IV. Related Vulnerabilities

Same product: signalk-server
Same vendor: SignalK
Same weakness: CWE-78

V. Comments for CVE-2025-66398

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