Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Web Services Interface Cross-Site Scripting Vulnerabilities
Only Cisco ASA or FTD Software running a vulnerable release with a specific AnyConnect or WebVPN configuration is affected. CVSS rates it 6.1 (medium). No fixed release is listed in the checked facts.
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Listed in CISA KEV
- How many real-world setups can hit the bug, from the vendor's advisory and CISA data. It does not know your setup.What do these mean? →
- Actively exploited
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
Cisco Adaptive Security Appliance (ASA) Software and Firepower Threat Defense (FTD) Software are affected, specifically when AnyConnect or WebVPN features are configured. An unauthenticated remote attacker could trick a user into clicking a malicious link, allowing the attacker to run harmful scripts in the user's browser session or access sensitive browser-based information.
Summarized by anthropic/claude-haiku-5.5. Verify details against the original sources.
Read the original 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.
Timeline
- CVE published
- Added to CISA KEV
CISA has evidence of exploitation in the wild
- CISA remediation deadline
Due date for US federal agencies to patch
- Record last updated
- EPSS reached 10%
FIRST estimates at least a 10% chance of exploitation in the next 30 days
Affected versions
- Cisco Cisco Adaptive Security Appliance (ASA) Software
Version range not reported
References 1
Questions about CVE-2020-3580
What does this mean?
The flaw lets script code run in the context of the web services interface, which can expose sensitive browser-based information. It is a cross-site scripting issue in the Cisco ASA and FTD web services interface.Source: sec.cloudapps.cisco.com
Am I affected, and how do I check?
Only Cisco ASA Software or FTD Software running a vulnerable release, with a specific AnyConnect or WebVPN configuration enabled, is affected. To check, compare the running release against the advisory and confirm whether AnyConnect or WebVPN is configured on the device.Source: sec.cloudapps.cisco.com
What should I do about it?
The checked facts do not name a fixed release, so no specific upgrade target can be given. Check the Cisco advisory for the fixed release that applies to your product and version.Source: sec.cloudapps.cisco.com
Is it being exploited?
Yes. CISA added it to its Known Exploited Vulnerabilities catalog on 2021-11-03, which means it has evidence of attacks. No public exploit code is tracked.Source: cisa.gov, cve.now feed data
What if there's no patch?
The checked facts do not describe a workaround. Until a fix is available, the only documented boundary is that the issue depends on the specific AnyConnect or WebVPN configuration.Source: sec.cloudapps.cisco.com