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.
Metrics
Affected Vendors & Products
References
History
Tue, 05 May 2026 21:45:00 +0000
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| First Time appeared |
Jupyter
Jupyter jupyter Server |
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| Vendors & Products |
Jupyter
Jupyter jupyter Server |
Tue, 05 May 2026 21:15:00 +0000
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| Metrics |
ssvc
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Tue, 05 May 2026 16:15:00 +0000
| Type | Values Removed | Values Added |
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| 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. | |
| Title | jupyter_server next parameter open redirect can redirect users to external domains | |
| Weaknesses | CWE-601 | |
| References |
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| Metrics |
cvssV4_0
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Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2026-05-05T20:16:59.332Z
Reserved: 2025-09-29T20:25:16.180Z
Link: CVE-2025-61669
Updated: 2026-05-05T20:16:10.899Z
Status : Received
Published: 2026-05-05T16:16:10.133
Modified: 2026-05-05T21:16:21.383
Link: CVE-2025-61669
No data.
OpenCVE Enrichment
Updated: 2026-05-05T21:30:05Z