{
    "id": "CVE-2021-27964",
    "published": "2021-03-05 02:15:12",
    "last_modified": "2026-06-17 03:45:40",
    "cvss_score": "9.8",
    "cvss_severity": "CRITICAL",
    "cvss_version": "3.1",
    "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
    "cwe": "CWE-434",
    "description": "SonLogger before 6.4.1 is affected by Unauthenticated Arbitrary File Upload. An attacker can send a POST request to /Config/SaveUploadedHotspotLogoFile without any authentication or session header. There is no check for the file extension or content of the uploaded file.",
    "epss_score": "0.47519",
    "epss_percentile": "0.98805",
    "kev": 0,
    "kev_due": null,
    "has_exploit": 1,
    "updated_at": "2026-09-26 18:27:09",
    "priority": {
        "rank": 2,
        "label": "Patch early",
        "why": "A public exploit exists."
    },
    "products": [
        {
            "vendor": "sfcyazilim",
            "product": "sonlogger"
        }
    ],
    "kev_detail": null,
    "exploits": [
        {
            "source": "exploit-db",
            "ref_id": "49651",
            "title": "SonLogger 4.2.3.3 - Unauthenticated Arbitrary File Upload (Metasploit)",
            "date": "2021-03-15",
            "url": "https://www.exploit-db.com/exploits/49651"
        }
    ],
    "refs_list": [
        "http://packetstormsecurity.com/files/161793/SonLogger-4.2.3.3-Shell-Upload.html",
        "https://github.com/erberkan/SonLogger-vulns",
        "https://www.sonlogger.com/releasenotes",
        "http://packetstormsecurity.com/files/161793/SonLogger-4.2.3.3-Shell-Upload.html",
        "https://github.com/erberkan/SonLogger-vulns",
        "https://www.sonlogger.com/releasenotes"
    ]
}