{
    "id": "CVE-2011-2523",
    "published": "2019-11-27 21:15:12",
    "last_modified": "2026-06-16 23:31:30",
    "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-78",
    "description": "vsftpd 2.3.4 downloaded between 20110630 and 20110703 contains a backdoor which opens a shell on port 6200/tcp.",
    "epss_score": "0.96184",
    "epss_percentile": "0.99877",
    "kev": 0,
    "kev_due": null,
    "has_exploit": 1,
    "updated_at": "2026-09-26 18:25:09",
    "priority": {
        "rank": 2,
        "label": "Patch early",
        "why": "A public exploit exists."
    },
    "products": [
        {
            "vendor": "debian",
            "product": "debian_linux"
        },
        {
            "vendor": "vsftpd_project",
            "product": "vsftpd"
        }
    ],
    "kev_detail": null,
    "exploits": [
        {
            "source": "exploit-db",
            "ref_id": "49757",
            "title": "vsftpd 2.3.4 - Backdoor Command Execution",
            "date": "2021-04-12",
            "url": "https://www.exploit-db.com/exploits/49757"
        },
        {
            "source": "exploit-db",
            "ref_id": "17491",
            "title": "vsftpd 2.3.4 - Backdoor Command Execution (Metasploit)",
            "date": "2011-07-05",
            "url": "https://www.exploit-db.com/exploits/17491"
        }
    ],
    "refs_list": [
        "http://packetstormsecurity.com/files/162145/vsftpd-2.3.4-Backdoor-Command-Execution.html",
        "https://access.redhat.com/security/cve/cve-2011-2523",
        "https://packetstormsecurity.com/files/102745/VSFTPD-2.3.4-Backdoor-Command-Execution.html",
        "https://security-tracker.debian.org/tracker/CVE-2011-2523",
        "https://vigilance.fr/vulnerability/vsftpd-backdoor-in-version-2-3-4-10805",
        "https://www.openwall.com/lists/oss-security/2011/07/11/5",
        "http://packetstormsecurity.com/files/162145/vsftpd-2.3.4-Backdoor-Command-Execution.html",
        "https://access.redhat.com/security/cve/cve-2011-2523",
        "https://packetstormsecurity.com/files/102745/VSFTPD-2.3.4-Backdoor-Command-Execution.html",
        "https://security-tracker.debian.org/tracker/CVE-2011-2523",
        "https://vigilance.fr/vulnerability/vsftpd-backdoor-in-version-2-3-4-10805",
        "https://www.openwall.com/lists/oss-security/2011/07/11/5"
    ]
}