PYSEC-2020-346

    Dashboard / Vulnerabilities / PYSEC-2020-346

    PYSEC-2020-346

    Published: 21 Dec 2020Last Modified: 9 Jul 2026

    Summary:

    Details: Withdrawn as duplicate of PYSEC-2020-50. The Jupyter Server provides the backend (i.e. the core services, APIs, and REST endpoints) for Jupyter web applications like Jupyter notebook, JupyterLab, and Voila. In Jupyter Server before version 1.1.1, an open redirect vulnerability could cause the jupyter server to redirect the browser to a different malicious website. All jupyter servers running without a base_url prefix are technically affected, however, these maliciously crafted links can only be reasonably made for known jupyter server hosts. A link to your jupyter server may *appear* safe, but ultimately redirect to a spoofed server on the public internet. This same vulnerability was patched in upstream notebook v5.7.8. This is fixed in jupyter_server 1.1.1. If upgrade is not available, a workaround can be to run your server on a url prefix: "jupyter server --ServerApp.base_url=/jupyter/".

    References: https://github.com/jupyter-server/jupyter_server/commit/85e4abccf6ea9321d29153f73b0bd72ccb3a6bca, https://github.com/jupyter-server/jupyter_server/security/advisories/GHSA-9f66-54xg-pc2c, https://pypi.org/project/jupyter-server/, https://advisory.checkmarx.net/advisory/CX-2020-4291

    Affected packages

    Package

    Name: jupyter-server

    Purl: pkg:pypi/jupyter-server

    Affected ranges

    Type: N/A

    Events:

    Introduced- None
    Fixed -None

    Affected versions

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    PYSEC-2020-346 | CVE-DB