CVE Tools
Sign in

CVE-2022-21222

Regular Expression Denial of Service (ReDoS)

Published: Sep 30, 2022Updated: May 20, 2025 Sources: CVE List NVD GHSACWE-1333
NVD MITRE
5.3CVSSMEDIUM
EPSS Score
1.4%
Top 30.6%
CISA KEV
Not in KEV
Exploits
1 Known
Remediation
Patch Available

Description

The package css-what before 2.1.3 are vulnerable to Regular Expression Denial of Service (ReDoS) due to the usage of insecure regular expression in the re_attr variable of index.js. The exploitation of this vulnerability could be triggered via the parse function.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:NA:L
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:LAvailability
Low
Open in CVSS calculator →

Weaknesses

CWE-1333

Affected Products

css-whatn/a
css-whatnpmOSS Libraries
css-whatcss-what project
Library
OSS Libraries / generic-library
npmpackage-ecosystemOSS Libraries
css-what projectoss-projectOSS Librariesaka css-what

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

1 exploit source identified

Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.

View exploit details
Official Patch Available

MITRE ATT&CK

1 technique
Impact
View detailed technique mapping

References

https://security.snyk.io/vuln/SNYK-JS-CSSWHAT-3035488
security.snyk.io
https://github.com/fb55/css-what/blob/a38effd5a8f5506d75c7f8f13cbd8c76248a3860/index.js%23L12
github.com
https://lists.debian.org/debian-lts-announce/2023/03/msg00001.html
lists.debian.org
and 4 more references View all →

Timeline

Published
Sep 30, 2022
Last Updated
May 20, 2025

Unlock Complete Vulnerability Intelligence

Get the full picture for CVE-2022-21222 and every CVE in our database. Create a free account — no credit card required.

Create Free Account
Plain-language analysis
Impact assessment and exploitation scenario in plain English
Attack graph visualization
Interactive attack path and kill chain mapping
Exploit details & PoC links
ExploitDB, Metasploit, GitHub PoCs with direct links
Nuclei scanner templates
Ready-to-use vulnerability scanner templates
Full remediation guide
Patch instructions, workarounds, and compliance impact
Interactive AI chat
Ask questions about this vulnerability in natural language
Related vulnerabilities
Semantically similar CVEs and attack patterns
REST API & MCP access
Integrate vulnerability data into your workflows