{"id":"CVE-2023-39968","aliases":["GHSA-r726-vmfq-j9j3","PYSEC-2023-155"],"title":" Open Redirect Vulnerability in jupyter-server","summary":" Open Redirect Vulnerability in jupyter-server","severity":"medium","cvss":6.1,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","vendor":"jupyter-server","product":"jupyter-server","ecosystem":"pip","affected":["jupyter-server < 2.7.2"],"patched":["jupyter-server 2.7.2"],"published":"2023-08-29","updated":"2026-09-10","sourceUpdated":"2026-09-10T03:50:02.877012647Z","source":"OSV","sourceUrl":"https://osv.dev/vulnerability/GHSA-r726-vmfq-j9j3","references":[{"url":"https://github.com/jupyter-server/jupyter_server/security/advisories/GHSA-r726-vmfq-j9j3"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-39968"},{"url":"https://github.com/jupyter-server/jupyter_server/commit/290362593b2ffb23c59f8114d76f77875de4b925"},{"url":"https://blog.xss.am/2023/08/cve-2023-39968-jupyter-token-leak"},{"url":"https://github.com/jupyter-server/jupyter_server"},{"url":"https://github.com/pypa/advisory-database/tree/main/vulns/jupyter-server/PYSEC-2023-155.yaml"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/NRP7DNZYVOIA4ZB3U3ZWKTFZEPYWNGCQ"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XDKQAWQN6SQTOVACZNXYKEHWQXGG4DOF"}],"tags":["osv","pip"],"epss":0.00681,"epssPercentile":0.51031,"ingestedAt":"2026-09-12T03:13:01.724Z","slug":"CVE-2023-39968","body":"## Overview\n\n### 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\n\n## Affected packages\n\n- `jupyter-server < 2.7.2`\n\n## Remediation\n\nUpgrade to a patched release:\n\n- `jupyter-server 2.7.2`","depth":"sunlit","depthScore":34,"depthScoreParts":{"impact":33.6,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}