{
  "cveId": "CVE-2021-21330",
  "url": "https://patchblox.com/security/cve/CVE-2021-21330",
  "summary": "CVE-2021-21330 is fixed in python3-aiohttp on 1 platform, first by python3-aiohttp 3.0.1-1ubuntu0.1~esm1, released February 25, 2021. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "python3-aiohttp: aiohttp is an asynchronous HTTP client/server framework for asyncio and Python",
  "description": "aiohttp is an asynchronous HTTP client/server framework for asyncio and Python. In aiohttp before version 3.7.4 there is an open redirect vulnerability. A maliciously crafted link to an aiohttp-based web-server could redirect the browser to a different website. It is caused by a bug in the \u0060aiohttp.web_middlewares.normalize_path_middleware\u0060 middleware. This security problem has been fixed in 3.7.4. Upgrade your dependency using pip as follows \u0022pip install aiohttp \u0026gt;= 3.7.4\u0022. If upgrading is not an option for you, a workaround can be to avoid using \u0060aiohttp.web_middlewares.normalize_path_middleware\u0060 in your applications.",
  "published": "2021-02-25T19:15:00Z",
  "severity": "Medium",
  "epss": 0.01905,
  "epssPercentile": 0.79858,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "python3-aiohttp",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "3.0.1-1ubuntu0.1~esm1",
      "fix": "python3-aiohttp 3.0.1-1ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-python3-aiohttp-3.0.1-1ubuntu0.1-esm1",
      "released": "2021-02-25T19:15:00Z"
    },
    {
      "platform": "linux",
      "product": "python3-aiohttp",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "3.6.2-1ubuntu0.1~esm1",
      "fix": "python3-aiohttp 3.6.2-1ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-python3-aiohttp-3.6.2-1ubuntu0.1-esm1",
      "released": "2021-02-25T19:15:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T01:18:40Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}