{"id":"CVE-2021-23433","aliases":["EUVD-2021-2399","GHSA-vpf5-82c8-9v36","SNYK-JS-ALGOLIASEARCHHELPER-1570421"],"status":"published","title":"Prototype Pollution","description":"The package algoliasearch-helper before 3.6.2 are vulnerable to Prototype Pollution due to use of the merge function in src/SearchParameters/index.jsSearchParameters._parseNumbers without any protection against prototype properties. Note that this vulnerability is only exploitable if the implementation allows users to define arbitrary search patterns.","severity":{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.01947,"percentile":0.80471,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-1321","CWE-915"],"published":"2021-11-19T19:25:12Z","modified":"2026-10-20T10:54:32Z","fixes":[{"ecosystem":"npm","package":"algoliasearch-helper","fixed_in":["3.6.2"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"npm","package":"algoliasearch-helper","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.6.2"}]}]},{"source":"osv","ecosystem":"npm","package":"algoliasearch-helper","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"3.6.2"}]}]}],"products":[{"vendor":"algolia","product":"algoliasearch-helper"}],"references":[{"url":"https://snyk.io/vuln/SNYK-JS-ALGOLIASEARCHHELPER-1570421","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory","evidence","web"]},{"url":"https://github.com/algolia/algoliasearch-helper-js/blob/3.5.5/src/SearchParameters/index.js%23L291","tags":["x_refsource_MISC","x_transferred","Broken Link","web"]},{"url":"https://github.com/algolia/algoliasearch-helper-js/commit/4ff542b70b92a6b81cce8b9255700b0bc0817edd","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory","fix","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-23433","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-vpf5-82c8-9v36"},{"url":"https://github.com/algolia/algoliasearch-helper-js","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2021-23433","title":"Prototype Pollution","description":"The package algoliasearch-helper before 3.6.2 are vulnerable to Prototype Pollution due to use of the merge function in src/SearchParameters/index.jsSearchParameters._parseNumbers without any protection against prototype properties. Note that this vulnerability is only exploitable if the implementation allows users to define arbitrary search patterns.","status":"published","published":"2021-11-19T19:25:12.337Z","modified":"2024-09-16T19:45:53.608Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P","level":"medium","assessor":"cna"}],"updated_at":"2026-11-02T14:33:00.488332Z"}],"euvd":[{"id":"EUVD-2021-2399","description":"The package algoliasearch-helper before 3.6.2 are vulnerable to Prototype Pollution due to use of the merge function in src/SearchParameters/index.jsSearchParameters._parseNumbers without any protection against prototype properties. Note that this vulnerability is only exploitable if the implementation allows users to define arbitrary search patterns.","status":"published","published":"2021-11-19T19:25:12Z","modified":"2024-09-16T19:45:53Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P","level":"medium"}],"updated_at":"2026-11-03T00:55:20.5822Z"}],"ghsa":[{"id":"GHSA-vpf5-82c8-9v36","title":"Prototype Pollution in algoliasearch-helper","description":"The package algoliasearch-helper before 3.6.2 are vulnerable to Prototype Pollution due to use of the merge function in src/SearchParameters/index.jsSearchParameters._parseNumbers without any protection against prototype properties. Note that this vulnerability is only exploitable if the implementation allows users to define arbitrary search patterns.","status":"published","published":"2021-11-23T21:15:35Z","modified":"2023-01-27T05:00:52Z","cvss":[{"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"}],"cwes":["CWE-915","CWE-1321"],"updated_at":"2026-11-02T14:36:15.574072Z"}],"nvd":[{"id":"CVE-2021-23433","description":"The package algoliasearch-helper before 3.6.2 are vulnerable to Prototype Pollution due to use of the merge function in src/SearchParameters/index.jsSearchParameters._parseNumbers without any protection against prototype properties. Note that this vulnerability is only exploitable if the implementation allows users to define arbitrary search patterns.","status":"published","published":"2021-11-19T20:15:17.903Z","modified":"2026-06-17T03:38:45.27Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","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":6.8,"vector":"AV:N/AC:M/Au:N/C:P/I:P/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-1321"],"updated_at":"2026-11-02T14:07:01.428028Z"}],"osv":[{"id":"CVE-2021-23433","description":"The package algoliasearch-helper before 3.6.2 are vulnerable to Prototype Pollution due to use of the merge function in src/SearchParameters/index.jsSearchParameters._parseNumbers without any protection against prototype properties. Note that this vulnerability is only exploitable if the implementation allows users to define arbitrary search patterns.","status":"published","published":"2021-11-19T20:15:17.903Z","modified":"2026-10-20T10:54:32.546056678Z","cvss":[{"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"}],"updated_at":"2026-11-02T15:44:18.367807Z"},{"id":"GHSA-vpf5-82c8-9v36","title":"Prototype Pollution in algoliasearch-helper","description":"The package algoliasearch-helper before 3.6.2 are vulnerable to Prototype Pollution due to use of the merge function in src/SearchParameters/index.jsSearchParameters._parseNumbers without any protection against prototype properties. Note that this vulnerability is only exploitable if the implementation allows users to define arbitrary search patterns.","status":"published","published":"2021-11-23T21:15:35Z","modified":"2026-09-10T03:49:16.25754851Z","cvss":[{"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"}],"cwes":["CWE-1321","CWE-915"],"updated_at":"2026-11-02T15:46:57.694388Z"}]}}