# CVE-2020-3580

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.

- Page: https://www.vulneraibility.com/cve/CVE-2020-3580
- CVSS: 6.1
- Known exploited: yes, in CISA KEV since 2021-11-03; CISA due date 2022-05-03; known ransomware use
- EPSS: 85.58% (percentile 99.7)
- Unvetted proof-of-concept code on GitHub: 4 GitHub proofs of concept · 1 Nuclei template (first 2021-06-25)
- CISA SSVC: exploitation active, automatable no, technical impact partial (assessed 2024-11-08)
- Weakness: CWE-79
- Published: 2020-10-21

## Affected

- cisco:secure_firewall_threat_defense
- cisco:adaptive_security_appliance_software

## References

- [advisory] https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-xss-multiple-FCB3vPZe
- [other] https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-3580

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Summary, impact and action are written by the vulneraibility.com AI analysis pipeline from the CVE record, NVD, CISA and FIRST data; verify against the references.