CVE-2025-61669
Last modified
CVE-2025-61669 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. 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`. EPSS estimates a 0.27% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Jupyter | Jupyter Server | < 2.18.0 |
References
- https://github.com/jupyter-server/jupyter_server/security/advisories/GHSA-qh7q-6qm3-653wExploit, Vendor Advisory
- https://github.com/jupyter-server/jupyter_server/security/advisories/GHSA-qh7q-6qm3-653wExploit, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
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