{"id":"CVE-2020-13697","url":"https://www.cyber-defence.io/tools/cve/CVE-2020-13697","generatedAt":"2026-10-27T21:18:38.185Z","title":"Any web server that extends this class without implementing its own GET handler is vulnerable to reflected XSS, because the GeneralHandler GET handler prints user input passed through the query string without any sanitization.","description":"An issue was discovered in RouterNanoHTTPD.java in NanoHTTPD through 2.3.1. The GeneralHandler class implements a basic GET handler that prints debug information as an HTML page. Any web server that extends this class without implementing its own GET handler is vulnerable to reflected XSS, because the GeneralHandler GET handler prints user input passed through the query string without any sanitization.","published":"2021-02-23T08:15:11.000Z","lastModified":"2026-06-17T02:53:35.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","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":["nanohttpd/nanohttpd"],"epss":{"score":0.00758,"percentile":0.54927,"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 (0.76%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"https://github.com/NanoHttpd/nanohttpd","tags":["Product","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://www.vdoo.com/advisories","tags":["Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://github.com/NanoHttpd/nanohttpd","tags":["Product","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.vdoo.com/advisories","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2020-13697","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."}