{"id":"CVE-2021-23329","aliases":["EUVD-2021-0543","GHSA-c497-v8pv-ch6x","ROOT-APP-NPM-CVE-2021-23329","SNYK-JS-NESTEDOBJECTASSIGN-1065977"],"status":"published","title":"Prototype Pollution","description":"The package nested-object-assign before 1.0.4 are vulnerable to Prototype Pollution via the default function, as demonstrated by running the PoC below.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.01539,"percentile":0.75101,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-1321","CWE-400"],"published":"2021-01-31T15:25:14Z","modified":"2026-10-20T10:54:31Z","fixes":[{"ecosystem":"npm","package":"nested-object-assign","fixed_in":["1.0.4"],"sources":["ghsa","osv"]},{"ecosystem":"Root:npm","package":"nested-object-assign","fixed_in":["1.0.3-aikido.1"],"sources":["osv"]},{"ecosystem":"Root:npm","package":"@rootio/nested-object-assign","fixed_in":["1.0.3-root.io.1"],"sources":["osv"]}],"affected":[{"source":"ghsa","ecosystem":"npm","package":"nested-object-assign","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.0.4"}]}]},{"source":"osv","ecosystem":"npm","package":"nested-object-assign","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.0.4"}]}]},{"source":"osv","ecosystem":"Root:npm","package":"nested-object-assign","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.0.3-aikido.1"}]}]},{"source":"osv","ecosystem":"Root:npm","package":"@rootio/nested-object-assign","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.0.3-root.io.1"}]}]}],"products":[{"vendor":"getadigital","product":"nested-object-assign"}],"references":[{"url":"https://snyk.io/vuln/SNYK-JS-NESTEDOBJECTASSIGN-1065977","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory","evidence","web"]},{"url":"https://github.com/Geta/NestedObjectAssign/pull/11","tags":["x_refsource_MISC","x_transferred","Exploit","Patch","Third Party Advisory","fix","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-23329","tags":["advisory"]},{"url":"https://www.npmjs.com/package/nested-object-assign","tags":["web"]},{"url":"https://github.com/advisories/GHSA-c497-v8pv-ch6x"}],"sources":{"cve":[{"id":"CVE-2021-23329","title":"Prototype Pollution","description":"The package nested-object-assign before 1.0.4 are vulnerable to Prototype Pollution via the default function, as demonstrated by running the PoC below.","status":"published","published":"2021-01-31T15:25:14.923Z","modified":"2024-09-16T16:32:38.564Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"cna"}],"updated_at":"2026-11-02T14:33:00.488332Z"}],"euvd":[{"id":"EUVD-2021-0543","description":"The package nested-object-assign before 1.0.4 are vulnerable to Prototype Pollution via the default function, as demonstrated by running the PoC below.","status":"published","published":"2021-01-31T15:25:14Z","modified":"2024-09-16T16:32:38Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-03T00:55:50.59293Z"}],"ghsa":[{"id":"GHSA-c497-v8pv-ch6x","title":"Prototype pollution in nested-object-assign","description":"The package nested-object-assign before 1.0.4 is vulnerable to Prototype Pollution via the default function.","status":"published","published":"2021-02-01T15:01:14Z","modified":"2023-08-08T19:28:28Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-400"],"updated_at":"2026-11-02T14:36:59.456342Z"}],"nvd":[{"id":"CVE-2021-23329","description":"The package nested-object-assign before 1.0.4 are vulnerable to Prototype Pollution via the default function, as demonstrated by running the PoC below.","status":"published","published":"2021-01-31T16:15:12.377Z","modified":"2026-06-17T03:38:34.053Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"secondary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-1321"],"updated_at":"2026-11-02T14:06:49.660551Z"}],"osv":[{"id":"CVE-2021-23329","description":"The package nested-object-assign before 1.0.4 are vulnerable to Prototype Pollution via the default function, as demonstrated by running the PoC below.","status":"published","published":"2021-01-31T16:15:12.377Z","modified":"2026-10-20T10:54:31.918263001Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:44:18.367807Z"},{"id":"GHSA-c497-v8pv-ch6x","title":"Prototype pollution in nested-object-assign","description":"The package nested-object-assign before 1.0.4 is vulnerable to Prototype Pollution via the default function.","status":"published","published":"2021-02-01T15:01:14Z","modified":"2026-07-08T06:49:37.286784636Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-400"],"updated_at":"2026-11-02T15:46:44.571161Z"},{"id":"ROOT-APP-NPM-CVE-2021-23329","title":"CVE-2021-23329 in nested-object-assign - Patched by Root","description":"Root has patched CVE-2021-23329 in the nested-object-assign package for Root:npm. Multiple fixed versions available.","status":"published","published":"2026-09-11T08:43:01Z","modified":"2026-09-11T09:15:05.86938046Z","updated_at":"2026-11-02T15:53:27.362922Z"}]}}