{"id":"CVE-2021-23509","aliases":["EUVD-2021-2324","GHSA-8gwj-8hxc-285w"],"status":"published","title":"Prototype Pollution","description":"This affects the package json-ptr before 3.0.0. A type confusion vulnerability can lead to a bypass of CVE-2020-7766 when the user-provided keys used in the pointer parameter 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/E:P/RL:O/RC:C","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.01828,"percentile":0.79146,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-1321","CWE-843"],"published":"2021-11-03T17:20:36Z","modified":"2026-06-17T03:38:48Z","fixes":[{"ecosystem":"npm","package":"json-ptr","fixed_in":["3.0.0"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"npm","package":"json-ptr","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.0.0"}]}]},{"source":"osv","ecosystem":"npm","package":"json-ptr","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"3.0.0"}]}]}],"products":[{"vendor":"json-ptr_project","product":"json-ptr"}],"references":[{"url":"https://snyk.io/vuln/SNYK-JS-JSONPTR-1577291","tags":["x_refsource_MISC","x_transferred","Exploit","Mitigation","Patch","Third Party Advisory","VDB Entry","web"]},{"url":"https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1767165","tags":["x_refsource_MISC","x_transferred","Exploit","Mitigation","Patch","Third Party Advisory","VDB Entry"]},{"url":"https://github.com/flitbit/json-ptr/pull/42","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory","web"]},{"url":"https://github.com/flitbit/json-ptr/commit/5dc458fbad1c382a2e3ca6d62e66ede3d92849ca","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory","web"]},{"url":"https://github.com/flitbit/json-ptr%23security-vulnerabilities-resolved","tags":["x_refsource_MISC","x_transferred","Broken Link","Third Party Advisory","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-23509","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-8gwj-8hxc-285w"},{"url":"https://github.com/flitbit/json-ptr","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2021-23509","title":"Prototype Pollution","description":"This affects the package json-ptr before 3.0.0. A type confusion vulnerability can lead to a bypass of CVE-2020-7766 when the user-provided keys used in the pointer parameter are arrays.","status":"published","published":"2021-11-03T17:20:36.571Z","modified":"2024-09-16T20:32:29.801Z","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/E:P/RL:O/RC:C","level":"medium","assessor":"cna"}],"updated_at":"2026-11-02T14:33:00.819444Z"}],"euvd":[{"id":"EUVD-2021-2324","description":"This affects the package json-ptr before 3.0.0. A type confusion vulnerability can lead to a bypass of CVE-2020-7766 when the user-provided keys used in the pointer parameter are arrays.","status":"published","published":"2021-11-03T17:20:36Z","modified":"2024-09-16T20:32:29Z","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/E:P/RL:O/RC:C","level":"medium"}],"updated_at":"2026-11-03T00:55:13.041098Z"}],"ghsa":[{"id":"GHSA-8gwj-8hxc-285w","title":"Prototype Pollution in json-ptr","description":"This affects the package `json-ptr` before `3.0.0`. A type confusion vulnerability can lead to a bypass of CVE-2020-7766 when the user-provided keys used in the pointer parameter are arrays.","status":"published","published":"2021-11-08T17:43:27Z","modified":"2023-02-01T05:06:15Z","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":"2026-11-02T14:36:38.281533Z"}],"nvd":[{"id":"CVE-2021-23509","description":"This affects the package json-ptr before 3.0.0. A type confusion vulnerability can lead to a bypass of CVE-2020-7766 when the user-provided keys used in the pointer parameter are arrays.","status":"published","published":"2021-11-03T18:15:08.073Z","modified":"2026-06-17T03:38:48.533Z","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-8gwj-8hxc-285w","title":"Prototype Pollution in json-ptr","description":"This affects the package `json-ptr` before `3.0.0`. A type confusion vulnerability can lead to a bypass of CVE-2020-7766 when the user-provided keys used in the pointer parameter are arrays.","status":"published","published":"2021-11-08T17:43:27Z","modified":"2025-01-14T09:12:03.022963Z","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":"2026-11-02T15:46:42.437513Z"}]}}