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.
- CVSS v3.1
- 6.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N - CVSS v3.1
- 6.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N - CVSS v2.0
- 2.6 LOW
AV:N/AC:H/Au:N/C:N/I:P/A:N - EPSS
- 85.58% chance of exploitation in the next 30 days, 100th percentile
- CISA KEV
- added 2021-11-03, used in ransomware campaigns
- Nuclei
- medium · CWE-79
- Published
- 2020-10-21
- Updated
- 2025-10-21
Proof-of-concept exploits (4)
- Hudi233/CVE-2020-35809★ · 2021-06-25
- adarshvs/CVE-2020-358019★ · 2021-07-10
- catatonicprime/CVE-2020-35802★ · 2022-07-15
- cruxN3T/CVE-2020-35800★ · 2026-05-07