{"id":"CVE-2021-25952","aliases":["EUVD-2021-2586","GHSA-v26w-gcxh-v4r7"],"status":"published","title":"Prototype polluation in just-safe-set","description":"Prototype pollution vulnerability in ‘just-safe-set’ versions 1.0.0 through 2.2.1 allows an 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":"2026-11-10","score":0.03337,"percentile":0.88746,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-1321","CWE-915"],"published":"2021-07-07T11:47:13Z","modified":"2026-10-20T10:54:34Z","fixes":[{"ecosystem":"npm","package":"just-safe-set","fixed_in":["2.2.2"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"npm","package":"just-safe-set","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.0.0"},{"fixed":"2.2.2"}]}]},{"source":"osv","ecosystem":"npm","package":"just-safe-set","ranges":[{"type":"SEMVER","events":[{"introduced":"1.0.0"},{"fixed":"2.2.2"}]}]}],"products":[{"vendor":"just-safe-set_project","product":"just-safe-set"}],"references":[{"url":"https://www.whitesourcesoftware.com/vulnerability-database/CVE-2021-25952","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory","evidence","web"]},{"url":"https://github.com/angus-c/just/commit/dd57a476f4bb9d78c6f60741898dc04c71d2eb53","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory","fix","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-25952","tags":["advisory"]},{"url":"https://github.com/angus-c/just/pull/267","tags":["web"]},{"url":"https://github.com/advisories/GHSA-v26w-gcxh-v4r7"},{"url":"https://github.com/angus-c/just","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2021-25952","description":"Prototype pollution vulnerability in ‘just-safe-set’ versions 1.0.0 through 2.2.1 allows an attacker to cause a denial of service and may lead to remote code execution.","status":"published","published":"2021-07-07T11:47:13Z","modified":"2024-08-03T20:19:18.981Z","updated_at":"2026-11-02T14:32:59.430294Z"}],"euvd":[{"id":"EUVD-2021-2586","description":"Prototype pollution vulnerability in ‘just-safe-set’ versions 1.0.0 through 2.2.1 allows an attacker to cause a denial of service and may lead to remote code execution.","status":"published","published":"2021-07-07T11:47:13Z","modified":"2024-08-03T20:19:18Z","updated_at":"2026-11-03T03:24:51.962182Z"}],"ghsa":[{"id":"GHSA-v26w-gcxh-v4r7","title":"Prototype polluation in just-safe-set","description":"Prototype pollution vulnerability in ‘just-safe-set’ versions 1.0.0 through 2.2.1 allows an attacker to cause a denial of service and may lead to remote code execution.","status":"published","published":"2021-12-10T18:50:40Z","modified":"2023-01-27T05:00:55Z","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-2021-25952","description":"Prototype pollution vulnerability in ‘just-safe-set’ versions 1.0.0 through 2.2.1 allows an attacker to cause a denial of service and may lead to remote code execution.","status":"published","published":"2021-07-07T12:15:08.573Z","modified":"2026-06-17T03:42:39.94Z","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":"2026-11-02T14:06:55.259633Z"}],"osv":[{"id":"CVE-2021-25952","description":"Prototype pollution vulnerability in ‘just-safe-set’ versions 1.0.0 through 2.2.1 allows an attacker to cause a denial of service and may lead to remote code execution.","status":"published","published":"2021-07-07T12:15:08.573Z","modified":"2026-10-20T10:54:34.611755748Z","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":"2026-11-02T15:44:18.778776Z"},{"id":"GHSA-v26w-gcxh-v4r7","title":"Prototype polluation in just-safe-set","description":"Prototype pollution vulnerability in ‘just-safe-set’ versions 1.0.0 through 2.2.1 allows an attacker to cause a denial of service and may lead to remote code execution.","status":"published","published":"2021-12-10T18:50:40Z","modified":"2023-11-08T04:05:18.383531Z","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":"2026-11-02T15:46:56.639206Z"}]}}