{"schemaVersion":3,"id":"CVE-2020-3580","aliases":[],"status":"published","duplicateOf":null,"title":"Cisco ASA and FTD Cross-Site Scripting (XSS) Vulnerability","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.","dates":{"published":"2020-10-21T18:40:26.821Z","modified":"2025-10-21T23:35:34.486Z","reserved":null,"kevAdded":["2021-11-03T00:00:00.000Z"],"kevDue":["2022-05-03T00:00:00.000Z"]},"cvss":{"headline":{"score":6.1,"severity":"medium","version":"3.1","versionLabel":"v3.1","source":"CVE.org","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":6.1,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":6.1,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","exploitability":null,"impact":null,"computed":false},{"version":"2.0","versionLabel":"v2.0","source":"NVD","score":2.6,"severity":"low","vector":"AV:N/AC:H/Au:N/C:N/I:P/A:N","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.85575,"percentile":0.99724,"severity":"critical","asOf":"2026-10-19T00:00:00.000Z","change":{"pp":0,"baselineDate":"2026-09-19T00:00:00.000Z","baselineScore":0.85575},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.85575,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.85575,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.85575,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.85575,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.85575,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.85575,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.85575,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.85575,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.85575,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.85575,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.85575,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.85575,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.85575,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.85575,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.85575,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.85575,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.85575,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.85575,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.85575,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.85575,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.85575,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.85575,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.85575,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.85575,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.85575,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.85575,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.85575,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.85575,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.85575,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.85575,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.85575,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.85575,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.85575,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.85575,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.85575,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.85575,"percentile":0.99724}],"last30":[{"date":"2026-09-19T00:00:00.000Z","score":0.85575,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.85575,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.85575,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.85575,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.85575,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.85575,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.85575,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.85575,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.85575,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.85575,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.85575,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.85575,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.85575,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.85575,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.85575,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.85575,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.85575,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.85575,"percentile":null},{"date":"2026-10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