Prototype Pollution in mootools

CRITICAL 9.8CVE-2021-23432 · GHSA-x6hx-7gh3-3q98 · Published 24/08/2021 · updated 17/06/2026

In short

CVE-2021-23432 is a CRITICAL (CVSS 9.8) vulnerability affecting mootools.
Chance of exploitation in the next 30 days (EPSS): 0.89%, higher than 59.5% of all vulnerabilities.
No patched version is listed yet: follow the vendor's advisory in References.

Package	Affected versions	Patched versions
mootools npm	`≤ 1.5.2`	No fix yet

This affects all versions of package mootools. This is due to the ability to pass untrusted input to Object.merge()

NVD description

This affects all versions of package mootools. This is due to the ability to pass untrusted input to Object.merge()

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