---
id: CVE-2020-3580
title: >-
  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 …
summary: >-
  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 …
severity: medium
cvss: 6.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N'
cwe:
  - CWE-79
  - CWE-79
vendor: cisco
product: secure_firewall_threat_defense
affected:
  - secure_firewall_threat_defense < 6.4.0.12
  - 'secure_firewall_threat_defense >= 6.5.0, < 6.6.4'
  - 'secure_firewall_threat_defense >= 6.7.0, < 6.7.0.2'
  - adaptive_security_appliance_software < 9.8.4.34
  - 'adaptive_security_appliance_software >= 9.9, < 9.9.2.85'
  - 'adaptive_security_appliance_software >= 9.10, < 9.12.4.13'
  - 'adaptive_security_appliance_software >= 9.13, < 9.13.1.21'
  - 'adaptive_security_appliance_software >= 9.14, < 9.14.2.8'
  - 'adaptive_security_appliance_software >= 9.15, < 9.15.1.15'
patched:
  - secure_firewall_threat_defense 6.7.0.2
  - adaptive_security_appliance_software 9.15.1.15
published: '2020-10-21'
updated: '2026-08-11'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2020-3580'
references:
  - url: >-
      https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-xss-multiple-FCB3vPZe
    label: psirt@cisco.com
  - url: >-
      https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-xss-multiple-FCB3vPZe
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-3580
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
  - kev
  - in-the-wild
  - exploit-available
epss: 0.85575
epssPercentile: 0.99719
kev: true
kevDateAdded: '2021-11-03'
kevDueDate: '2022-05-03'
kevRansomware: true
exploited: true
ingestedAt: '2026-08-18T12:28:06.544Z'
exploits:
  github: 4
  githubRepos:
    - 'https://github.com/Hudi233/CVE-2020-3580'
    - 'https://github.com/adarshvs/CVE-2020-3580'
    - 'https://github.com/cruxN3T/CVE-2020-3580'
  nuclei:
    - CVE-2020-3580
  checkedAt: '2026-09-21T15:23:59.199Z'
exploitAvailable: true
---

## Overview

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.

## Affected

- `secure_firewall_threat_defense < 6.4.0.12`
- `secure_firewall_threat_defense >= 6.5.0, < 6.6.4`
- `secure_firewall_threat_defense >= 6.7.0, < 6.7.0.2`
- `adaptive_security_appliance_software < 9.8.4.34`
- `adaptive_security_appliance_software >= 9.9, < 9.9.2.85`
- `adaptive_security_appliance_software >= 9.10, < 9.12.4.13`
- `adaptive_security_appliance_software >= 9.13, < 9.13.1.21`
- `adaptive_security_appliance_software >= 9.14, < 9.14.2.8`
- `adaptive_security_appliance_software >= 9.15, < 9.15.1.15`

## Remediation

Upgrade past the affected range:

- `secure_firewall_threat_defense 6.7.0.2`
- `adaptive_security_appliance_software 9.15.1.15`