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PyPI package

nbgrader

Open actionable advisories and recorded vendor fixes. This public package view has no inventory attached and cannot establish whether your deployment is affected. A vendor fix never resolves your finding; verify your installed version and the source guidance.

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1 actionable advisory, newest first. Withdrawn advisories and news are excluded. Coverage is partial.

  1. High, CVSS 8.6PyPIAmendedPublished

    nbgrader's frame-ancestors: self grants all users access to formgrader

    CVE-2025-23205 · GHSA-fcr8-4r9f-r66m

    Affected
    • PyPI nbgrader >= 0.9.4, <= 0.9.4
    Fixed in
    0.9.5· Vendor fix available
    Issue
    Impact Enabling frame-ancestors: 'self' grants any JupyterHub user the ability to extract formgrader content by sending malicious links to users with access to formgrader, at least when using the default JupyterHub configuration of enablesubdomains = False. #1915 disables a protection which would allow user Alice to craft a page embedding formgrader in an IFrame. If Bob visits that page, his credentials will be sent and the formgrader page loaded. Because Alice's page is on the same Origin as the formgrader iframe, Javasript on Alice's page has full access to the contents of the page served by formgrader using Bob's credentials. Workarounds - Disable frame-ancestors: self, or - enable per-user and per-service subdomains with JupyterHub.enablesubdomains = True (then even if embedding in an IFrame is allowed, the host page does not have access to the contents of the frame). References JupyterHub documentation on why and when frame-ancestors: self is insecure, and why it was disabled by…

    Recommended action: Upgrade to 0.9.5 or later, then redeploy and verify.A vendor fix does not resolve your finding until you verify it in your own systems.

    Sources:osv.dev (1)github.com (2)Source checked Evidence →