CVE-2021-32821

MEDIUM

MooTools < 1.6.0 - Regular Expression Denial of Service via CSS Selector Parser

Title source: llm
STIX 2.1

Description

MooTools is a collection of JavaScript utilities for JavaScript developers. All known versions include a CSS selector parser that is vulnerable to Regular Expression Denial of Service (ReDoS). An attack requires that an attacker can inject a string into a CSS selector at runtime, which is quite common with e.g. jQuery CSS selectors. No patches are available for this issue.

References (1)

Core 1
Core References

Scores

CVSS v3 6.2
EPSS 0.0064
EPSS Percentile 45.9%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact partial

Details

CWE
CWE-1333 CWE-400
Status published
Products (2)
mootools/mootools < 1.6.0
npm/mootools 0npm
Published Jan 03, 2023
Tracked Since Feb 18, 2026