{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 2.2.2"
      },
      "package": {
        "ecosystem": "Go",
        "name": "github.com/gotify/server"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.2.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2023-01-10T22:48:43Z",
    "nvd_published_at": null,
    "severity": "MODERATE"
  },
  "details": "### Impact\n\nGotify exposes an outdated instance of the [Swagger UI](https://swagger.io/tools/swagger-ui/) API documentation frontend at `/docs` which is susceptible to reflected XSS attacks when loading external Swagger config files.\n\nSpecifically, the DOMPurify version included with this version of Swagger UI is vulnerable to a [rendering XSS](https://www.vidocsecurity.com/blog/hacking-swagger-ui-from-xss-to-account-takeovers/) incorporating the mutation payload detailed in [CVE-2020-26870](https://research.securitum.com/mutation-xss-via-mathml-mutation-dompurify-2-0-17-bypass/) which was patched in 2021. This is further tracked in the GitHub Advisory Database as GHSA-QRMM-W75W-3WPX.\n\nAn attacker can execute arbitrary JavaScript and potentially take over the account of the user that clicked the link. Keep in mind, the Gotify UI won\u0027t natively expose such a malicious link, so an attacker has to get the user to open the malicious link in a context outside of Gotify.\n\n### Patches\n\nThe vulnerability has been fixed in version 2.2.3.\n\n### References\n\nhttps://github.com/gotify/server/pull/541",
  "id": "GHSA-3244-8mff-w398",
  "modified": "2023-01-10T22:48:43Z",
  "published": "2023-01-10T22:48:43Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/gotify/server/security/advisories/GHSA-3244-8mff-w398"
    },
    {
      "type": "WEB",
      "url": "https://github.com/gotify/server/pull/541"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/gotify/server"
    },
    {
      "type": "WEB",
      "url": "https://research.securitum.com/mutation-xss-via-mathml-mutation-dompurify-2-0-17-bypass"
    },
    {
      "type": "WEB",
      "url": "https://www.vidocsecurity.com/blog/hacking-swagger-ui-from-xss-to-account-takeovers"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [],
  "summary": "Reflected XSS in Gotify\u0027s /docs via import of outdated Swagger UI"
}