CVE-2025-57323 mpregular vulnerable to prototype pollution
Attackers can cause denial of service via prototype pollution in the mpregular JavaScript framework by injecting properties into Object.prototype.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-57323?
CVE-2025-57323 is a high-severity vulnerability in n/a, published on 24 Sep 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-1321
Which versions are affected by CVE-2025-57323?
2 open source packages ship an affected version, including mpregular. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
mpregular npm | All versions to 0.2.0 | None |
mpregular npm | All versions to 0.2.0 | None |
Products include Regularjs Mpregular.
How do I fix CVE-2025-57323?
No fix has been published for CVE-2025-57323 yet. Limit exposure of the affected software until one is available.
Is CVE-2025-57323 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-57323 exists.
Sources
Also known as GHSA-xx4g-r65p-3qf2.