{"id":"GHSA-xx4g-r65p-3qf2","summary":"mpregular vulnerable to prototype pollution","details":"mpregular is a package that provides a small program development framework based on RegularJS. A Prototype Pollution vulnerability in the mp.addEventHandler function of mpregular version 0.2.0 and before allows attackers to inject properties on Object.prototype via supplying a crafted payload, causing denial of service (DoS) as the minimum consequence.","aliases":["CVE-2025-57323"],"modified":"2025-09-25T20:14:29.532375Z","published":"2025-09-24T21:30:37Z","database_specific":{"cwe_ids":["CWE-1321"],"severity":"HIGH","github_reviewed":true,"github_reviewed_at":"2025-09-25T19:28:53Z","nvd_published_at":"2025-09-24T20:15:32Z"},"references":[{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-57323"},{"type":"WEB","url":"https://github.com/VulnSageAgent/PoCs/blob/main/JavaScript/prototype-pollution/mpregular%400.2.0/index.js"},{"type":"WEB","url":"https://github.com/VulnSageAgent/PoCs/tree/main/JavaScript/prototype-pollution/CVE-2025-57323"},{"type":"PACKAGE","url":"https://github.com/regularjs/regular"}],"affected":[{"package":{"name":"mpregular","ecosystem":"npm","purl":"pkg:npm/mpregular"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"last_affected":"0.2.0"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/09/GHSA-xx4g-r65p-3qf2/GHSA-xx4g-r65p-3qf2.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}