{"id":"CVE-2021-20089","aliases":["EUVD-2021-7546","GHSA-fc5x-mj45-vx78"],"status":"published","title":"Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') in purl...","description":"Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') in purl 2.3.2 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":0.01606,"percentile":0.76088,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-1321"],"published":"2021-04-23T18:35:40Z","modified":"2026-10-24T10:30:47Z","products":[{"vendor":"purl_project","product":"purl"}],"references":[{"url":"https://github.com/BlackFan/client-side-prototype-pollution/blob/master/pp/purl.md","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory","evidence"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-20089"},{"url":"https://github.com/advisories/GHSA-fc5x-mj45-vx78"}],"sources":{"cve":[{"id":"CVE-2021-20089","description":"Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') in purl 2.3.2 allows a malicious user to inject properties into Object.prototype.","status":"published","published":"2021-04-23T18:35:40Z","modified":"2024-08-03T17:30:07.578Z","updated_at":"2026-11-02T14:32:55.564736Z"}],"euvd":[{"id":"EUVD-2021-7546","description":"Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') in purl 2.3.2 allows a malicious user to inject properties into Object.prototype.","status":"published","published":"2021-04-23T18:35:40Z","modified":"2024-08-03T17:30:07Z","updated_at":"2026-11-03T03:25:09.841069Z"}],"ghsa":[{"id":"GHSA-fc5x-mj45-vx78","title":"Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') in purl...","description":"Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') in purl 2.3.2 allows a malicious user to inject properties into Object.prototype.","status":"published","published":"2022-05-24T22:01:34Z","modified":"2023-01-30T05:05:14Z","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":"2026-11-02T14:47:13.441339Z"}],"nvd":[{"id":"CVE-2021-20089","description":"Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') in purl 2.3.2 allows a malicious user to inject properties into Object.prototype.","status":"published","published":"2021-04-23T19:15:11.14Z","modified":"2026-06-17T03:33:15.39Z","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-2021-20089","description":"Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') in purl 2.3.2 allows a malicious user to inject properties into Object.prototype.","status":"published","published":"2021-04-23T19:15:11.14Z","modified":"2026-10-24T10:30:47.916444975Z","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"}]}}