{"id":"CVE-2021-25948","url":"https://www.cyber-defence.io/tools/cve/CVE-2021-25948","generatedAt":"2026-10-28T01:51:44.900Z","title":"Prototype pollution vulnerability in 'expand-hash' versions 0.1.0 through 1.0.1 allows an attacker to cause a denial of service and may lead to remote code execution.","description":"Prototype pollution vulnerability in 'expand-hash' versions 0.1.0 through 1.0.1 allows an attacker to cause a denial of service and may lead to remote code execution.","published":"2021-06-10T12:15:09.000Z","lastModified":"2026-06-17T03:42:40.000Z","status":"Modified","sourceIdentifier":"vulnerabilitylab@mend.io","cvss":{"version":"3.1","score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-1321"],"affected":["expand-hash project/expand-hash"],"epss":{"score":0.03299,"percentile":0.88436,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (3.30%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://github.com/doowb/expand-hash/blob/556913f6c2f05848110b5b8261cfc78e5ce3dc77/index.js#L19","tags":["Exploit","Third Party Advisory"],"source":"vulnerabilitylab@mend.io"},{"url":"https://www.whitesourcesoftware.com/vulnerability-database/CVE-2021-25948","tags":["Exploit","Third Party Advisory"],"source":"vulnerabilitylab@mend.io"},{"url":"https://github.com/doowb/expand-hash/blob/556913f6c2f05848110b5b8261cfc78e5ce3dc77/index.js#L19","tags":["Exploit","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.whitesourcesoftware.com/vulnerability-database/CVE-2021-25948","tags":["Exploit","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-25948","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}