{"id":"CVE-2021-25945","aliases":["EUVD-2021-1358","GHSA-mh82-55cm-6gfh"],"status":"published","title":"Prototype pollution vulnerability in js-extend","description":"Prototype pollution vulnerability in 'js-extend' versions 0.0.1 through 1.0.1 allows attacker to cause a denial of service and may lead to remote code execution.","severity":{"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","from":"nvd"},"epss":{"day":"2026-11-09","score":0.02961,"percentile":0.87309,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-1321","CWE-915"],"published":"2021-05-26T14:22:31Z","modified":"2026-06-17T03:42:39Z","affected":[{"source":"ghsa","ecosystem":"npm","package":"js-extend","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"1.0.1"}]}]},{"source":"osv","ecosystem":"npm","package":"js-extend","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"last_affected":"1.0.1"}]}]}],"products":[{"vendor":"js-extend_project","product":"js-extend"}],"references":[{"url":"https://www.whitesourcesoftware.com/vulnerability-database/CVE-2021-25945","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-25945","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-mh82-55cm-6gfh"},{"url":"https://github.com/vmattos/js-extend","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2021-25945","description":"Prototype pollution vulnerability in 'js-extend' versions 0.0.1 through 1.0.1 allows attacker to cause a denial of service and may lead to remote code execution.","status":"published","published":"2021-05-26T14:22:31Z","modified":"2024-08-03T20:19:18.525Z","updated_at":"2026-11-02T14:32:59.802172Z"}],"euvd":[{"id":"EUVD-2021-1358","description":"Prototype pollution vulnerability in 'js-extend' versions 0.0.1 through 1.0.1 allows attacker to cause a denial of service and may lead to remote code execution.","status":"published","published":"2021-05-26T14:22:31Z","modified":"2024-08-03T20:19:18Z","updated_at":"2026-11-03T03:24:51.962182Z"}],"ghsa":[{"id":"GHSA-mh82-55cm-6gfh","title":"Prototype pollution vulnerability in js-extend","description":"Prototype pollution vulnerability in 'js-extend' versions 0.0.1 through 1.0.1 allows attacker to cause a denial of service and may lead to remote code execution.","status":"published","published":"2021-06-08T23:16:03Z","modified":"2023-01-27T05:00:53Z","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-2021-25945","description":"Prototype pollution vulnerability in 'js-extend' versions 0.0.1 through 1.0.1 allows attacker to cause a denial of service and may lead to remote code execution.","status":"published","published":"2021-05-26T15:15:08.153Z","modified":"2026-06-17T03:42:39.333Z","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","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-1321"],"updated_at":"2026-11-02T14:06:53.987491Z"}],"osv":[{"id":"GHSA-mh82-55cm-6gfh","title":"Prototype pollution vulnerability in js-extend","description":"Prototype pollution vulnerability in 'js-extend' versions 0.0.1 through 1.0.1 allows attacker to cause a denial of service and may lead to remote code execution.","status":"published","published":"2021-06-08T23:16:03Z","modified":"2023-11-08T04:05:18.019087Z","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":"2026-11-02T15:46:51.811331Z"}]}}