{"id":"GHSA-xg68-chx2-253g","summary":"Prototype Pollution in jquery-deparam","details":"Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') in jquery-deparam allows a malicious user to inject properties into Object.prototype.","aliases":["CVE-2021-20087"],"modified":"2025-08-14T22:15:23Z","published":"2021-05-24T19:53:01Z","database_specific":{"severity":"HIGH","github_reviewed":true,"github_reviewed_at":"2021-05-20T21:58:11Z","nvd_published_at":"2021-04-23T18:15:00Z","cwe_ids":["CWE-1321"]},"references":[{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2021-20087"},{"type":"WEB","url":"https://github.com/BlackFan/client-side-prototype-pollution/blob/master/pp/jquery-deparam.md"},{"type":"WEB","url":"https://github.com/RetireJS/retire.js/blob/6da45fcb6a3425e55ee8181b2ac35168879bf086/repository/jsrepository-master.json#L824-L842"}],"affected":[{"package":{"name":"jquery-deparam","ecosystem":"npm","purl":"pkg:npm/jquery-deparam"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"last_affected":"0.5.3"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2021/05/GHSA-xg68-chx2-253g/GHSA-xg68-chx2-253g.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}