{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "datasette-indieauth"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "1.0"
            },
            {
              "fixed": "1.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.0"
      ]
    }
  ],
  "aliases": [],
  "database_specific": {
    "cwe_ids": [
      "CWE-290"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2020-11-24T21:20:38Z",
    "nvd_published_at": null,
    "severity": "CRITICAL"
  },
  "details": "### Impact\n\nA malicious user can sign in as a user with any IndieAuth identifier. This is because the implementation does not verify that the final `\"me\"` URL value returned by the authorization server belongs to the same domain as the initial value entered by the user.\n\n### Patches\n\nVersion 1.1 fixes this issue.\n\n### Workarounds\n\nThere is no workaround. Upgrade to 1.1 immediately.\n\n### References\n\n- [Security Considerations: Differing User Profile URLs](https://indieauth.spec.indieweb.org/#differing-user-profile-urls-li-1) in the IndieAuth specification.\n\n### For more information\n\nIf you have any questions or comments about this advisory:\n\n* Open an issue in [simonw/datasette-indieauth](https://github.com/simonw/datasette-indieauth/issues)",
  "id": "GHSA-mjcr-rqjg-rhg3",
  "modified": "2022-03-21T20:04:49Z",
  "published": "2020-11-24T21:21:04Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/simonw/datasette-indieauth/security/advisories/GHSA-mjcr-rqjg-rhg3"
    },
    {
      "type": "WEB",
      "url": "https://github.com/simonw/datasette-indieauth/commit/376c8804c6b0811852049229a24336fe5eb6a439"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/simonw/datasette-indieauth"
    },
    {
      "type": "WEB",
      "url": "https://pypi.org/project/datasette-indieauth"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [],
  "summary": "Implementation trusts the \"me\" field returned by the authorization server without verifying it"
}