{"cve":"CVE-2021-23413","nvd":{"published":"2021-07-25T13:15:07.390","modified":"2026-06-17T03:38:43.067","status":"Modified","description":"This affects the package jszip before 3.7.0. Crafting a new zip file with filenames set to Object prototype values (e.g __proto__, toString, etc) results in a returned object with a modified prototype instance.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","score":5.3},"cwes":[],"references":["https://github.com/Stuk/jszip/blob/master/lib/object.js%23L88","https://github.com/Stuk/jszip/commit/22357494f424178cb416cdb7d93b26dd4f824b36","https://github.com/Stuk/jszip/pull/766","https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARS-1251499","https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1251498"],"products":["jszip_project:jszip"],"source":"nvd","synced_at":"2026-10-19T21:21:13.713336758+00:00"},"epss":{"cve":"CVE-2021-23413","score":0.03441,"percentile":0.88981,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-jg8v-48h5-wgxg","url":"https://osv.dev/vulnerability/GHSA-jg8v-48h5-wgxg","summary":"jszip Vulnerable to Prototype Pollution","modified":"2025-01-14T09:12:20.664854Z","packages":[{"ecosystem":"npm","name":"jszip","purl":"pkg:npm/jszip","ranges":[">=3.0.0 <3.7.0"],"fixed":["3.7.0"]},{"ecosystem":"npm","name":"jszip","purl":"pkg:npm/jszip","ranges":["<2.7.0"],"fixed":["2.7.0"]}]}],"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."]}