Resource exhaustion in Mootools
CVE-2021-32821
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.
Vulnerability class: DoS (Denial of Service)
EPSS: 0.006 (47.2th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.2 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Mootools
- Mootools Mootools-core — versions 1.6.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security-advisories@github.com (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-32821?
- CVE-2021-32821 is a medium-severity vulnerability in Mootools, classified under Uncontrolled Resource Consumption. CVSS score: 6.2/10. Published 2023-01-03.
- How severe is CVE-2021-32821?
- Medium severity. CVSS v3 base score is 6.2 out of 10.
- Is CVE-2021-32821 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.