{"id":"CVE-2018-21030","aliases":["GHSA-jqwc-jm56-wcwj","PYSEC-2019-157"],"url":"https://o3.security/vulnerability/CVE-2018-21030","summary":"Cross-site scripting in Jupyter Notebook","details":"Jupyter Notebook before 5.5.0 does not use a CSP header to treat served files as belonging to a separate origin. Thus, for example, an XSS payload can be placed in an SVG document.","published":"2019-10-31T15:15:10.420Z","modified":"2026-08-07T14:59:00.106535Z","cvss":{"score":5.3,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"PyPI","name":"notebook","fixedVersion":"5.5.0rc1"}],"fix":{"url":"https://github.com/jupyter/notebook/pull/3341","label":"jupyter/notebook#3341"},"references":[{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2020/11/msg00033.html"},{"type":"ADVISORY","url":"https://github.com/jupyter/notebook/releases/tag/5.5.0"},{"type":"FIX","url":"https://github.com/jupyter/notebook/pull/3341"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-07T14:59:00.106535Z"}}