Is CVE-2021-3803 in the CISA KEV catalog?

No. CVE-2021-3803 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-3803?

CVE-2021-3803 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2021-3803?

CVE-2021-3803 has an EPSS score of 2.01% (78th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-3803?

Upgrade node-nth-check on debian 11 to 2.0.0-1+deb11u1 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2021-3803

HIGHEPSS 78th pctl

7.5

CVSS v3

NVD

Description

nth-check is vulnerable to Inefficient Regular Expression Complexity

CWE-1333

How to fix

Remediation Available

node-nth-checkDebian

Fixed in:2.0.0-1+deb11u1CVE-2021-3803

Fixed in:2.0.1-1CVE-2021-3803

node-nth-checkUbuntu

Fixed in:1.0.1-1+deb10u1build0.18.04.1USN-6114-1

Fixed in:1.0.1-1+deb10u1build0.20.04.1USN-6114-1

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

AvailabilityHigh

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

Exploit Intelligence

2.01%probability of exploitation in 30 days

78thpercentile

Elevated risk: more likely to be exploited than 78% of all known CVEs.

References

Patch2

Third-Party Advisory1

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 2024-11-21.