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

{
    "lastseen": "",
    "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.",
    "published": "2026-01-01T18:00:38.575Z",
    "modified": "2026-01-01T18:00:38.575Z",
    "type": "cve",
    "title": "Signal K Server has Unauthenticated State Pollution leading to Remote Code Execution (RCE)",
    "source": "GitHub_M",
    "references": "https://github.com/SignalK/signalk-server/security/advisories/GHSA-w3x5-7c4c-66p9\nhttps://github.com/SignalK/signalk-server/releases/tag/v2.19.0",
    "id": "CVE-2025-66398",
    "bulletinFamily": "",
    "cwe": [
        "CWE-78",
        "CWE-913"
    ],
    "cvelist": null,
    "sourceData": "SignalK signalk-server < 2.19.0",
    "sourceHref": "",
    "cvss": {
        "score": 9.7,
        "severity": "CRITICAL",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "signalk-server",
    "version": "< 2.19.0",
    "vendor": "SignalK",
    "ai_description": "Unauthenticated state pollution vulnerability allowing account takeover and Remote Code Execution (RCE)",
    "ai_severity": "Critical",
    "ai_vendor": "SignalK",
    "ai_product": "signalk-server",
    "ai_version": "< 2.19.0",
    "ai_score": 9.7
}