{"id":"CVE-2021-32862","url":"https://www.cyber-defence.io/tools/cve/CVE-2021-32862","generatedAt":"2026-10-27T23:43:20.750Z","title":"The GitHub Security Lab discovered sixteen ways to exploit a cross-site scripting vulnerability in nbconvert.","description":"The GitHub Security Lab discovered sixteen ways to exploit a cross-site scripting vulnerability in nbconvert. When using nbconvert to generate an HTML version of a user-controllable notebook, it is possible to inject arbitrary HTML which may lead to cross-site scripting (XSS) vulnerabilities if these HTML notebooks are served by a web server (eg: nbviewer).","published":"2022-08-18T19:15:14.000Z","lastModified":"2026-06-17T03:53:47.000Z","status":"Modified","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"3.1","score":5.4,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N"},"cwe":["CWE-79"],"affected":["jupyter/nbconvert","debian/debian linux"],"epss":{"score":0.01476,"percentile":0.73677,"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 (1.48%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"https://github.com/jupyter/nbconvert/security/advisories/GHSA-9jmq-rx5f-8jwq","tags":["Exploit","Third Party Advisory"],"source":"security-advisories@github.com"},{"url":"https://github.com/jupyter/nbviewer/security/advisories/GHSA-h274-fcvj-h2wm","tags":["Broken Link"],"source":"security-advisories@github.com"},{"url":"https://lists.debian.org/debian-lts-announce/2023/06/msg00003.html","tags":["Mailing List","Third Party Advisory"],"source":"security-advisories@github.com"},{"url":"https://github.com/jupyter/nbconvert/security/advisories/GHSA-9jmq-rx5f-8jwq","tags":["Exploit","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/jupyter/nbviewer/security/advisories/GHSA-h274-fcvj-h2wm","tags":["Broken Link"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.debian.org/debian-lts-announce/2023/06/msg00003.html","tags":["Mailing List","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.debian.org/debian-lts-announce/2024/09/msg00004.html","source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-32862","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."}