Security advisory

{
  "id": "2bfdf8c0da1ba8b837cd01b2fa0bda50a5e6364bc43d823f494ca8555d0a7a83",
  "url": "https://osv.dev/vulnerability/CVE-2020-36191",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2020-36191",
    "summary": "JupyterHub 1.1.0 allows CSRF in the admin panel via a request that lacks an _xsrf field, as demonstrated by a /hub/api/user request (to add or remove a user account).",
    "evidence": "osv:CVE-2020-36191",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2020-36191",
      "aliases": [
        "BIT-jupyterhub-2020-36191",
        "CVE-2020-36191",
        "GHSA-7xx3-qp5w-fw96",
        "PYSEC-2021-67"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:H/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/jupyterhub/jupyterhub",
              "type": "GIT",
              "events": [
                {
                  "introduced": "3663d7c8fcba2118dd469a8a4cca540cc63a39cf"
                },
                {
                  "last_affected": "3663d7c8fcba2118dd469a8a4cca540cc63a39cf"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:jupyter:jupyterhub:1.1.0:-:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "1.1.0-NA"
                      },
                      {
                        "last_affected": "1.1.0-NA"
                      }
                    ],
                    "source": "CPE_STRING"
                  }
                ]
              }
            }
          ],
          "versions": [
            "1.1.0-NA",
            "1.1.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-36191.json"
          }
        }
      ],
      "modified": "2026-10-20T10:54:20.471084353Z",
      "provider": "osv",
      "references": [
        "https://github.com/jupyterhub/jupyterhub/releases",
        "https://github.com/jupyterhub/jupyterhub/issues/3304"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2020-36191",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 385091,
  "published_at": "2021-01-13T04:15:13.073+00:00"
}