CVE-2024-35225: Jupyter server proxy Cross-Site Scripting Vulnerability

{
  "schema_version" : "1.4.0",
  "id" : "GHSA-fvcq-4x64-hqxr",
  "modified" : "2025-02-28T17:38:13Z",
  "published" : "2024-06-11T21:12:47Z",
  "aliases" : [ "CVE-2024-35225" ],
  "summary" : "Jupyter Server Proxy has a reflected XSS issue in host parameter",
  "details" : "### Impact\n\nThere is a reflected cross-site scripting (XSS) issue in `jupyter-server-proxy`[1]. The `/proxy` endpoint accepts a `host` path segment in the format `/proxy/<host>`. When this endpoint is called with an invalid `host` value, `jupyter-server-proxy` replies with a response that includes the value of `host`, without sanitization [2]. A third-party actor can leverage this by sending a phishing link with an invalid `host` value containing custom JavaScript to a user. When the user clicks this phishing link, the browser renders the response of `GET /proxy/<host>`, which runs the custom JavaScript contained in `host` set by the actor.\nAs any arbitrary JavaScript can be run after the user clicks on a phishing link, this issue permits extensive access to the user's JupyterLab instance for an actor. This issue exists in the latest release of `jupyter-server-proxy`, currently `v4.1.2`.\n**Impacted versions:** `>=3.0.0,<=4.1.2`\n\n### Patches\n\nThe patches are included in `==4.2.0` and `==3.2.4`.\n\n### Workarounds\n\nServer operators who are unable to upgrade can disable the `jupyter-server-proxy` extension with:\n\n```\njupyter server extension disable jupyter-server-proxy\n```\n\n### References\n\n[1] : https://github.com/jupyterhub/jupyter-server-proxy/\n[2] : https://github.com/jupyterhub/jupyter-server-proxy/blob/62a290f08750f7ae55a0c29ca339c9a39a7b2a7b/jupyter_server_proxy/handlers.py#L328",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "jupyter-server-proxy"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "3.0.0"
      }, {
        "fixed" : "3.2.4"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "jupyter-server-proxy"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "4.0.0"
      }, {
        "fixed" : "4.2.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/jupyterhub/jupyter-server-proxy/security/advisories/GHSA-fvcq-4x64-hqxr"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2024-35225"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/jupyterhub/jupyter-server-proxy/commit/7abc9dc5bbb0b4b440548a5375261b8b8192fc22"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/jupyterhub/jupyter-server-proxy/commit/ff78128087e73fb9d0909e1366f8bf051e8ea878"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/jupyterhub/jupyter-server-proxy"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/jupyterhub/jupyter-server-proxy/blob/62a290f08750f7ae55a0c29ca339c9a39a7b2a7b/jupyter_server_proxy/handlers.py#L328"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/pypa/advisory-database/tree/main/vulns/jupyter-server-proxy/PYSEC-2024-236.yaml"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-116", "CWE-79" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2024-06-11T21:12:47Z",
    "nvd_published_at" : "2024-06-11T22:15:09Z"
  }
}