{"id":"CVE-2021-20087","aliases":["EUVD-2021-1232","GHSA-xg68-chx2-253g"],"status":"published","title":"Prototype Pollution in jquery-deparam","description":"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.","severity":{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-10","score":0.02072,"percentile":0.81609,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-1321"],"published":"2021-04-23T17:58:23Z","modified":"2026-10-24T10:31:05Z","affected":[{"source":"ghsa","ecosystem":"npm","package":"jquery-deparam","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"0.5.3"}]}]},{"source":"osv","ecosystem":"npm","package":"jquery-deparam","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"last_affected":"0.5.3"}]}]}],"products":[{"vendor":"acemetrix","product":"jquery-deparam"}],"references":[{"url":"https://github.com/BlackFan/client-side-prototype-pollution/blob/master/pp/jquery-deparam.md","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory","evidence","web"]},{"url":"https://github.com/RetireJS/retire.js/blob/6da45fcb6a3425e55ee8181b2ac35168879bf086/repository/jsrepository-master.json#L824-L842","tags":["web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-20087","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-xg68-chx2-253g"}],"sources":{"cve":[{"id":"CVE-2021-20087","description":"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.","status":"published","published":"2021-04-23T17:58:23Z","modified":"2025-08-14T20:55:35.525Z","updated_at":"2026-11-02T14:32:55.19484Z"}],"euvd":[{"id":"EUVD-2021-1232","description":"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.","status":"published","published":"2021-04-23T17:58:23Z","modified":"2025-08-14T20:55:35Z","cvss":[{"version":"","score":0,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"none"}],"updated_at":"2026-11-02T20:31:57.477883Z"}],"ghsa":[{"id":"GHSA-xg68-chx2-253g","title":"Prototype Pollution in jquery-deparam","description":"Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') in jquery-deparam allows a malicious user to inject properties into Object.prototype.","status":"published","published":"2021-05-24T19:53:01Z","modified":"2025-08-14T22:15:23Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-1321"],"updated_at":"2026-11-02T14:38:53.767052Z"}],"nvd":[{"id":"CVE-2021-20087","description":"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.","status":"published","published":"2021-04-23T18:15:08.067Z","modified":"2026-06-17T03:33:15.197Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":6.5,"vector":"AV:N/AC:L/Au:S/C:P/I:P/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-1321"],"updated_at":"2026-11-02T14:06:52.03307Z"}],"osv":[{"id":"CVE-2021-20087","description":"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.","status":"published","published":"2021-04-23T18:15:08.067Z","modified":"2026-10-24T10:31:05.782752611Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:44:17.663289Z"},{"id":"GHSA-xg68-chx2-253g","title":"Prototype Pollution in jquery-deparam","description":"Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') in jquery-deparam allows a malicious user to inject properties into Object.prototype.","status":"published","published":"2021-05-24T19:53:01Z","modified":"2025-08-14T22:15:23Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-1321"],"updated_at":"2026-11-02T15:46:59.835583Z"}]}}