{"id":"CVE-2020-3121","url":"https://www.cyber-defence.io/tools/cve/CVE-2020-3121","generatedAt":"2026-10-27T22:24:14.378Z","title":"A vulnerability in the web-based management interface of Cisco Small Business Smart and Managed Switches could allow an unauthenticated, remote attacker to conduct a cross-site scripting (XSS) attack against a user of the interface.","description":"A vulnerability in the web-based management interface of Cisco Small Business Smart and Managed Switches could allow an unauthenticated, remote attacker to conduct a cross-site scripting (XSS) attack against a user of the interface. The vulnerability is due to insufficient validation of user-supplied input by the web-based management interface of the affected device. An attacker could exploit this vulnerability by persuading a user of the interface to click a malicious link and access a specific page. A successful exploit could allow the attacker to execute arbitrary script code in the context of the affected interface or access sensitive, browser-based information.","published":"2020-01-26T05:15:17.000Z","lastModified":"2026-06-17T03:17:24.000Z","status":"Modified","sourceIdentifier":"psirt@cisco.com","cvss":{"version":"3.1","score":6.1,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"},"cwe":["CWE-79"],"affected":["cisco/sg250x-24 firmware","cisco/sg250x-24p firmware","cisco/sg250x-48 firmware","cisco/sg250x-48p firmware","cisco/sg250-08 firmware","cisco/sg250-08hp firmware","cisco/sg250-10p firmware","cisco/sg250-18 firmware","cisco/sg250-26 firmware","cisco/sg250-26hp firmware","cisco/sg250-26p firmware","cisco/sg250-50 firmware","cisco/sg250-50hp firmware","cisco/sg250-50p firmware","cisco/sg250-24 firmware","cisco/sg250-24p firmware","cisco/sg250-48 firmware","cisco/sg250-48hp firmware","cisco/sf350-48 firmware","cisco/sf350-48p firmware","cisco/sf350-48mp firmware","cisco/sg350-10 firmware","cisco/sg350-10p firmware","cisco/sg350-10mp firmware","cisco/sg355-10mp firmware","cisco/sg350-28 firmware","cisco/sg350-28p firmware","cisco/sg350-28mp firmware","cisco/sx550x-16ft firmware","cisco/sx550x-24ft firmware","cisco/sx550x-12ft firmware","cisco/sx550x-24 firmware","cisco/sx550x-52 firmware","cisco/sg550x-24 firmware","cisco/sg550x-24p firmware","cisco/sg550x-24mp firmware","cisco/sg550x-24mpp firmware","cisco/sg550x-48 firmware","cisco/sg550x-48p firmware","cisco/sg550x-48mp firmware","cisco/sf550x-24 firmware","cisco/sf550x-24p firmware","cisco/sf550x-48 firmware","cisco/sf550x-48p firmware","cisco/sf550x-48mp firmware"],"epss":{"score":0.01066,"percentile":0.6452,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (1.07%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20200122-sbsms-xss","tags":["Vendor Advisory"],"source":"psirt@cisco.com"},{"url":"https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20200122-sbsms-xss","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2020-3121","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}