{"id":"CVE-2025-61669","state":"PUBLISHED","title":"jupyter_server next parameter open redirect can redirect users to external domains","description":"Jupyter Server is the backend for Jupyter web applications. In jupyter_server versions through 2.17.0, the next query parameter in the login flow is insufficiently validated in `LoginFormHandler._redirect_safe()`, which allows redirects to arbitrary external domains via values such as `///example.com`. An attacker can use a crafted login URL to redirect users to a malicious site and facilitate phishing attacks. This issue is fixed in version 2.18.0.","publishedAt":"2026-05-05T15:28:43.833Z","updatedAt":"2026-05-05T20:16:59.332Z","severity":{"score":6.3,"label":"Medium","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["jupyter-server jupyter_server"],"affected":[{"vendor":"jupyter-server","product":"jupyter_server","versions":[{"version":"<= 2.17.0","status":"affected"}]}],"references":["https://github.com/jupyter-server/jupyter_server/security/advisories/GHSA-qh7q-6qm3-653w"],"weaknesses":["CWE-601"],"ingestedAt":"2026-10-29T20:09:48.677Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/61xxx/CVE-2025-61669.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-61669","state":"PUBLISHED","datePublished":"2026-05-05T15:28:43.833Z","dateUpdated":"2026-05-05T20:16:59.332Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2025-09-29T20:25:16.180Z"},"containers":{"cna":{"title":"jupyter_server next parameter open redirect can redirect users to external domains","descriptions":[{"lang":"en","value":"Jupyter Server is the backend for Jupyter web applications. In jupyter_server versions through 2.17.0, the next query parameter in the login flow is insufficiently validated in `LoginFormHandler._redirect_safe()`, which allows redirects to arbitrary external domains via values such as `///example.com`. An attacker can use a crafted login URL to redirect users to a malicious site and facilitate phishing attacks. This issue is fixed in version 2.18.0."}],"affected":[{"vendor":"jupyter-server","product":"jupyter_server","versions":[{"version":"<= 2.17.0","status":"affected"}]}],"references":[{"url":"https://github.com/jupyter-server/jupyter_server/security/advisories/GHSA-qh7q-6qm3-653w","name":"https://github.com/jupyter-server/jupyter_server/security/advisories/GHSA-qh7q-6qm3-653w","tags":["x_refsource_CONFIRM"]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"PASSIVE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"HIGH","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":6.3,"baseSeverity":"MEDIUM","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N","version":"4.0"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-601","lang":"en","description":"CWE-601: URL Redirection to Untrusted Site ('Open Redirect')","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-05-05T15:28:43.833Z"},"source":{"advisory":"GHSA-qh7q-6qm3-653w","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/jupyter-server/jupyter_server/security/advisories/GHSA-qh7q-6qm3-653w","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-05-05T20:16:38.460105Z","id":"CVE-2025-61669","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-05-05T20:16:59.332Z"}}]}}}