PT-2025-39333 · Mpregular · Mpregular

Published 2025-09-24 · Updated 2025-10-17 · CVE-2025-57323

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions mpregular versions 0.2.0 and earlier

Description A Prototype Pollution issue exists in the mp.addEventHandler function of mpregular, a package providing a program development framework based on RegularJS. Attackers can inject properties onto Object.prototype by providing a crafted payload, potentially leading to a denial of service (DoS).

Recommendations Update mpregular to a version later than 0.2.0.

Exploit

Fix

DoS

Prototype Pollution

Weakness Enumeration

CWE-1321

Related Identifiers

CVE-2025-57323

GHSA-XX4G-R65P-3QF2

Affected Products

Mpregular

References · 9

• 🔥 https://github.com/VulnSageAgent/PoCs/tree/main/JavaScript/prototype-pollution/CVE-2025-57323 · Exploit
• 🔥 https://github.com/VulnSageAgent/PoCs/blob/main/JavaScript/prototype-pollution/mpregular%400.2.0/index.js · Exploit
• https://osv.dev/vulnerability/GHSA-xx4g-r65p-3qf2 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2025-57323 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-57323 · Security Note
• https://github.com/regularjs/regular · Note
• https://twitter.com/CVEnew/status/1970996094147740065 · Twitter Post
• https://t.me/CVEtracker/33291 · Telegram Post
• https://t.me/cveNotify/139116 · Telegram Post