{
    "id": "CVE-2020-3580",
    "published": "2020-10-21 19:15:18",
    "last_modified": "2026-08-11 19:42:47",
    "cvss_score": "6.1",
    "cvss_severity": "MEDIUM",
    "cvss_version": "3.1",
    "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
    "cwe": "CWE-79",
    "description": "Multiple vulnerabilities in the web services interface of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to conduct cross-site scripting (XSS) attacks against a user of the web services interface of an affected device. The vulnerabilities are due to insufficient validation of user-supplied input by the web services interface of an affected device. An attacker could exploit these vulnerabilities by persuading a user of the interface to click a crafted link. A successful exploit could allow the attacker to execute arbitrary script code in the context of the interface or allow the attacker to access sensitive, browser-based information. Note: These vulnerabilities affect only specific AnyConnect and WebVPN configurations. For more information, see the Vulnerable Products section.",
    "epss_score": "0.85575",
    "epss_percentile": "0.99718",
    "kev": 1,
    "kev_due": "2022-05-03",
    "has_exploit": 0,
    "updated_at": "2026-09-26 18:26:30",
    "priority": {
        "rank": 1,
        "label": "Patch first",
        "why": "On CISA KEV — known exploited in the wild, due 2022-05-03."
    },
    "products": [
        {
            "vendor": "cisco",
            "product": "adaptive_security_appliance_software"
        },
        {
            "vendor": "cisco",
            "product": "secure_firewall_threat_defense"
        }
    ],
    "kev_detail": {
        "cve_id": "CVE-2020-3580",
        "date_added": "2021-11-03",
        "due_date": "2022-05-03",
        "vendor": "Cisco",
        "product": "Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD)",
        "name": "Cisco ASA and FTD Cross-Site Scripting (XSS) Vulnerability",
        "ransomware": 1
    },
    "exploits": [],
    "refs_list": [
        "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-xss-multiple-FCB3vPZe",
        "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-xss-multiple-FCB3vPZe",
        "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-3580"
    ]
}