{"id":"CVE-2023-39968","aliases":["GHSA-r726-vmfq-j9j3","PYSEC-2023-155"],"url":"https://o3.security/vulnerability/CVE-2023-39968","summary":"Open Redirect Vulnerability in jupyter-server","details":"### Impact\n\nOpen Redirect Vulnerability. Maliciously crafted login links to known Jupyter Servers  can cause successful login or an already logged-in session to be redirected to arbitrary sites, which should be restricted to Jupyter Server-served URLs.\n\n\n### Patches\n\nUpgrade to Jupyter Server 2.7.2\n\n### Workarounds\n\nNone.\n\n### References\n\nVulnerability reported by user davwwwx via the [bug bounty program](https://app.intigriti.com/programs/jupyter/jupyter/detail) [sponsored by the European Commission](https://commission.europa.eu/news/european-commissions-open-source-programme-office-starts-bug-bounties-2022-01-19_en) and hosted on the [Intigriti platform](https://www.intigriti.com/).\n\n- https://blog.xss.am/2023/08/cve-2023-39968-jupyter-token-leak/\n","published":"2023-08-28T20:16:20.851Z","modified":"2026-08-12T03:51:11.108416723Z","cvss":{"score":4.3,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N"},"epss":{"score":0.00681,"percentile":0.50799,"asOf":"2026-09-17"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"PyPI","name":"jupyter-server","fixedVersion":"2.7.2"}],"fix":{"url":"https://github.com/jupyter-server/jupyter_server/commit/290362593b2ffb23c59f8114d76f77875de4b925","label":"jupyter-server/jupyter_server@2903625"},"references":[{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/NRP7DNZYVOIA4ZB3U3ZWKTFZEPYWNGCQ/"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XDKQAWQN6SQTOVACZNXYKEHWQXGG4DOF/"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/39xxx/CVE-2023-39968.json"},{"type":"ADVISORY","url":"https://github.com/jupyter-server/jupyter_server/security/advisories/GHSA-r726-vmfq-j9j3"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-39968"},{"type":"FIX","url":"https://github.com/jupyter-server/jupyter_server/commit/290362593b2ffb23c59f8114d76f77875de4b925"},{"type":"WEB","url":"https://blog.xss.am/2023/08/cve-2023-39968-jupyter-token-leak"},{"type":"PACKAGE","url":"https://github.com/jupyter-server/jupyter_server"},{"type":"WEB","url":"https://github.com/pypa/advisory-database/tree/main/vulns/jupyter-server/PYSEC-2023-155.yaml"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/NRP7DNZYVOIA4ZB3U3ZWKTFZEPYWNGCQ"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XDKQAWQN6SQTOVACZNXYKEHWQXGG4DOF"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:11.108416723Z"}}