{"id":"CVE-2021-23820","aliases":["EUVD-2021-2394","GHSA-v5vg-g7rq-363w"],"status":"published","title":"Prototype Pollution","description":"This affects all versions of package json-pointer. A type confusion vulnerability can lead to a bypass of CVE-2020-7709 when the pointer components are arrays.","severity":{"version":"3.1","score":5.6,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.01873,"percentile":0.79675,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-1321","CWE-843"],"published":"2021-11-03T17:20:10Z","modified":"2026-09-10T03:49:16Z","fixes":[{"ecosystem":"npm","package":"json-pointer","fixed_in":["0.6.2"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"npm","package":"json-pointer","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"0.6.1"},{"fixed":"0.6.2"}]}]},{"source":"osv","ecosystem":"npm","package":"json-pointer","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"0.6.2"}]}]}],"products":[{"vendor":"manuelstofer","product":"json-pointer"}],"references":[{"url":"https://snyk.io/vuln/SNYK-JS-JSONPOINTER-1577287","tags":["x_refsource_MISC","x_transferred","Exploit","Mitigation","Patch","Third Party Advisory","VDB Entry","web"]},{"url":"https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1910686","tags":["x_refsource_MISC","x_transferred","Exploit","Mitigation","Patch","Third Party Advisory","VDB Entry"]},{"url":"https://github.com/manuelstofer/json-pointer/blob/master/index.js%23L78","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-23820","tags":["advisory"]},{"url":"https://github.com/manuelstofer/json-pointer/pull/36","tags":["web"]},{"url":"https://github.com/manuelstofer/json-pointer/commit/931b0f9c7178ca09778087b4b0ac7e4f505620c2","tags":["web"]},{"url":"https://github.com/advisories/GHSA-v5vg-g7rq-363w"},{"url":"https://github.com/manuelstofer/json-pointer","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2021-23820","title":"Prototype Pollution","description":"This affects all versions of package json-pointer. A type confusion vulnerability can lead to a bypass of CVE-2020-7709 when the pointer components are arrays.","status":"published","published":"2021-11-03T17:20:10.614Z","modified":"2024-09-16T16:14:13.506Z","cvss":[{"version":"3.1","score":5.6,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L","level":"medium","assessor":"cna"}],"updated_at":"2026-11-02T14:33:00.488332Z"}],"euvd":[{"id":"EUVD-2021-2394","description":"This affects all versions of package json-pointer. A type confusion vulnerability can lead to a bypass of CVE-2020-7709 when the pointer components are arrays.","status":"published","published":"2021-11-03T17:20:10Z","modified":"2024-09-16T16:14:13Z","cvss":[{"version":"3.1","score":5.6,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L","level":"medium"}],"updated_at":"2026-11-03T00:55:53.554412Z"}],"ghsa":[{"id":"GHSA-v5vg-g7rq-363w","title":"Prototype Pollution in json-pointer","description":"This affects versions of package `json-pointer` up to and including `0.6.1`. A type confusion vulnerability can lead to a bypass of CVE-2020-7709 when the pointer components are arrays.","status":"published","published":"2021-11-08T17:40:49Z","modified":"2023-01-27T05:01:59Z","cvss":[{"version":"3.1","score":5.6,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L","level":"medium"}],"cwes":["CWE-843","CWE-1321"],"updated_at":"2026-11-02T14:36:17.04874Z"}],"nvd":[{"id":"CVE-2021-23820","description":"This affects all versions of package json-pointer. A type confusion vulnerability can lead to a bypass of CVE-2020-7709 when the pointer components are arrays.","status":"published","published":"2021-11-03T18:15:08.287Z","modified":"2026-06-17T03:38:53.627Z","cvss":[{"version":"3.1","score":5.6,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L","level":"medium","assessor":"secondary"},{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary"},{"version":"2.0","score":7.5,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","level":"high","assessor":"primary"}],"cwes":["CWE-843"],"updated_at":"2026-11-02T14:07:00.549994Z"}],"osv":[{"id":"GHSA-v5vg-g7rq-363w","title":"Prototype Pollution in json-pointer","description":"This affects versions of package `json-pointer` up to and including `0.6.1`. A type confusion vulnerability can lead to a bypass of CVE-2020-7709 when the pointer components are arrays.","status":"published","published":"2021-11-08T17:40:49Z","modified":"2026-09-10T03:49:16.207096403Z","cvss":[{"version":"3.1","score":5.6,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L","level":"medium"}],"cwes":["CWE-1321","CWE-843"],"updated_at":"2026-11-02T15:46:56.639206Z"}]}}