CVE-2025-57323: mpregular is a package that provides a small program development framework based on RegularJS

This month

HIGH 7.5REMOTEUPGRADE

CVE-2025-57323 is a high-severity flaw (CVSS 7.5) affecting mpregular. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 64%)
CISA exploited list	No
Weakness	CWE-1321
Published	2025-09-24
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: regularjs

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-09-24 20:15 UTCPublished CVE record published
2026-06-17 09:43 UTCUpdated Record last modified

regularjs mpregular UPGRADE

Affected: <= 0.2.0

Fixed in: newer than 0.2.0

Safe to downgrade to: no unaffected older release

1. Check installed version

npm ls mpregular

2. UPGRADE to newer than 0.2.0

npm install mpregular@">0.2.0"

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-57323?

mpregular: upgrade to newer than 0.2.0. Exact commands for each OS are on this page.

Is CVE-2025-57323 being exploited?

CVE-2025-57323 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-57323 affect?

CVE-2025-57323 affects mpregular. Severity is high (CVSS 7.5). 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 propertie

How urgent is CVE-2025-57323?

Priority 40/100. High severity; Remotely exploitable, no login, no user action

References

← Back to latest CVEs