{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "versions": [
              {
                "introduced": "0"
              },
              {
                "last_affected": "0.5.1"
              }
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "f4be87dfe0e6da13455e9bbbcd4f6a3fa358d71e"
            }
          ],
          "repo": "https://github.com/acemetrix/jquery-deparam",
          "type": "GIT"
        }
      ]
    }
  ],
  "details": "Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') in jquery-deparam 0.5.1 allows a malicious user to inject properties into Object.prototype.",
  "id": "CVE-2021-20087",
  "modified": "2026-03-13T21:50:20.429683466Z",
  "published": "2021-04-23T18:15:08.067Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/RetireJS/retire.js/blob/6da45fcb6a3425e55ee8181b2ac35168879bf086/repository/jsrepository-master.json#L824-L842"
    },
    {
      "type": "EVIDENCE",
      "url": "https://github.com/BlackFan/client-side-prototype-pollution/blob/master/pp/jquery-deparam.md"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}