CVE-2020-3580

criticalknown exploitedpublic exploitcovered by 1 sourcefirst seen 2021-11-03

Actively exploited. CVE-2020-3580 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2021-11-03) — exploitation has been observed in the wild, and US federal agencies are required to remediate it under BOD 22-01. Treat patching as urgent.

Public exploit code is available. Proof-of-concept or working exploit code for CVE-2020-3580 is indexed in GitHub PoC and Nuclei. Expect opportunistic scanning and exploitation attempts — prioritize remediation.

Cisco Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD) contain an insufficient input validation vulnerability for user-supplied input by the web services interface. Successful exploitation could allow an attacker to perform cross-site scripting (XSS) in the context of the interface or access sensitive browser-based information.

CSIRTS triage

vendor: Cisco product: Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD)Cross-site scripting

What: An insufficient input validation vulnerability allows for cross-site scripting (XSS).
Who is affected: Users of Cisco ASA and FTD devices.
Urgency: Immediate action is required due to active exploitation and critical severity.
Action: Apply the latest security patches for ASA and FTD.

AI-assisted analysis generated from the source advisory — verify against the original.

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Exploitation outlook

Exploitation confirmedAlready exploited in the wild (CISA KEV) — the prediction phase is over. Patch now. Riskier than 100% of all EPSS-scored CVEs.

Exploit availability

Public exploit or proof-of-concept code for CVE-2020-3580 is indexed in these free datasets. Available exploit code raises real-world risk independent of the CVSS score.

GitHub PoCPublic proof-of-concept repositories on GitHub reference this CVE.look it up ↗
NucleiA nuclei-templates detection/PoC template exists for this CVE.look it up ↗

Advisory coverage (1)

criticalexploitedCVE-2020-3580: Cisco ASA and FTD Cross-Site Scripting (XSS) Vulnerabilitycisa-kev · 2021-11-03

External references

NVD record for CVE-2020-3580

CVE.org record

CISA KEV catalog

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