CVE-2025-57323
High
Description
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.
SeverityHigh
CVSS7.5
Exploit probability—
ProductRegularjs Mpregular
PublishedSep 24, 2025
First seenSep 24, 2025
Weakness typeCWE-1321Prototype pollution
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| regularjs mpregular | v ≤ 0.2.0 | — |
| mpregularnpm | v ≤ 0.2.0 | — |
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