{"cve":"CVE-2021-25927","nvd":{"published":"2021-04-26T11:15:08.217","modified":"2026-06-17T03:42:35.960","status":"Modified","description":"Prototype pollution vulnerability in 'safe-flat' versions 2.0.0 through 2.0.1 allows an attacker to cause a denial of service and may lead to remote code execution.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":9.8},"cwes":["CWE-1321"],"references":["https://github.com/jessie-codes/safe-flat/commit/4b9b7db976bba8c968354f4315f5f9c219b7cbf3","https://www.whitesourcesoftware.com/vulnerability-database/CVE-2021-25927","https://github.com/jessie-codes/safe-flat/commit/4b9b7db976bba8c968354f4315f5f9c219b7cbf3","https://www.whitesourcesoftware.com/vulnerability-database/CVE-2021-25927"],"products":["safe-flat_project:safe-flat"],"source":"nvd","synced_at":"2026-10-19T21:17:01.373894544+00:00"},"epss":{"cve":"CVE-2021-25927","score":0.03337,"percentile":0.88644,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-33rv-m2gp-mm2r","url":"https://osv.dev/vulnerability/GHSA-33rv-m2gp-mm2r","summary":"Prototype pollution in safe-flat","modified":"2023-11-08T04:05:17.468833Z","packages":[{"ecosystem":"npm","name":"safe-flat","purl":"pkg:npm/safe-flat","ranges":[">=2.0.0 <2.0.2"],"fixed":["2.0.2"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}