Vulnerability Details : 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 category: Denial of service
Products affected by CVE-2021-32821
- cpe:2.3:a:mootools:mootools:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-32821
0.09%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 37 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-32821
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
7.5
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
3.9
|
3.6
|
NIST | |
|
6.2
|
MEDIUM | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
2.5
|
3.6
|
GitHub, Inc. |
CWE ids for CVE-2021-32821
-
The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources.Assigned by: security-advisories@github.com (Secondary)
-
The product uses a regular expression with an inefficient, possibly exponential worst-case computational complexity that consumes excessive CPU cycles.Assigned by: nvd@nist.gov (Primary)
References for CVE-2021-32821
-
https://securitylab.github.com/advisories/GHSL-2020-345-redos-mootools/
GHSL-2020-345: Regular expression Denial of Service in mootools - CVE-2021-32821 | GitHub Security LabExploit;Third Party Advisory
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