CVE-2020-3580: Cisco ASA and FTD Cross-Site Scripting (XSS) Vulnerability

CVE-2020-3580 · Severity: critical · CVSS 6.1 · Exploited in the wild · Published 2021-11-03

Cisco ASA and FTD Software contain multiple cross-site scripting (XSS) vulnerabilities in their web services interface due to insufficient input validation. An unauthenticated remote attacker can exploit these by persuading a user to click a crafted link, allowing the execution of arbitrary script code or access to sensitive browser information.

Technologies: Cisco Adaptive Security Appliance (ASA), Cisco Firepower Threat Defense (FTD). Vendors: Cisco.

Quick answers

Is CVE-2020-3580 exploited in the wild?
Yes. CVE-2020-3580 is known to be exploited in the wild, first recorded on 3 November 2021. Treat it as urgent.
How severe is CVE-2020-3580?
Critical severity, with a CVSS score of 6.1, published 3 November 2021.
Which products and versions are affected?
Cisco Adaptive Security Appliance (ASA) Software 9.7 to 9.8.4.34, 9.9 to 9.9.2.85, 9.10 to 9.12.4.13, 9.13 to 9.13.1.21, 9.14 to 9.14.2.8, 9.15 to 9.15.1.15; Cisco Firepower Threat Defense (FTD) Software Up to 6.4.0.12, 6.5.0 to 6.6.4, 6.7.0 to 6.7.0.2.
Is there a fix for CVE-2020-3580?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2020-3580 attacked?
It is attacked over the network, in a network appliance.
Am I affected by CVE-2020-3580?
Check whether you run Cisco Adaptive Security Appliance (ASA) or Cisco Firepower Threat Defense (FTD). Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Affected products

  • Cisco Adaptive Security Appliance (ASA) Software 9.7 to 9.8.4.34, 9.9 to 9.9.2.85, 9.10 to 9.12.4.13, 9.13 to 9.13.1.21, 9.14 to 9.14.2.8, 9.15 to 9.15.1.15
  • Cisco Firepower Threat Defense (FTD) Software Up to 6.4.0.12, 6.5.0 to 6.6.4, 6.7.0 to 6.7.0.2

Timeline

  • 2021-11-03: kev added: Added to CISA Known Exploited Vulnerabilities Catalog
  • 2021-11-03: disclosed
  • 2021-11-03: exploited: Reported as exploited in the wild.

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