Is CVE-2022-21222 in the CISA KEV catalog?

No. CVE-2022-21222 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2022-21222?

CVE-2022-21222 has a CVSS v3 base score of 5.3 (MEDIUM).

What is the EPSS score for CVE-2022-21222?

CVE-2022-21222 has an EPSS score of 1.42% (70th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2022-21222?

Upgrade node-css-what on debian 11 to 4.0.0-3+deb11u1 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2022-21222

MEDIUM

5.3

CVSS v3

NVD

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.

CWE-1333

How to fix

Remediation Available

node-css-whatDebian

Fixed in:4.0.0-3+deb11u1CVE-2022-21222

Fixed in:5.0.1-1CVE-2022-21222

node-css-whatUbuntu

Fixed in:2.1.0-1ubuntu0.16.04.1~esm1USN-6065-1

Fixed in:2.1.0-1+deb10u1build0.18.04.1USN-6065-1

Fixed in:3.2.1-1ubuntu0.1~esm1USN-6065-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityLow

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Exploit Intelligence

1.42%probability of exploitation in 30 days

70thpercentile

Moderate risk: more likely to be exploited than 70% of all known CVEs.

References

Exploit1

security.snyk.io

Third-Party Advisory1

github.com

Other references1

lists.debian.org

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-05-20.