Is CVE-2021-43307 in the CISA KEV catalog?

No. CVE-2021-43307 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-43307?

CVE-2021-43307 has a CVSS v3 base score of 5.9 (MEDIUM).

What is the EPSS score for CVE-2021-43307?

CVE-2021-43307 has an EPSS score of 1.46% (70th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-43307?

Upgrade semver-regex to 4.0.3 or later.

CVE & CISA-KEV Catalog

CVE-2021-43307

MEDIUMEPSS 70th pctl

5.9

CVSS v3

NVD

Description

An exponential ReDoS (Regular Expression Denial of Service) can be triggered in the semver-regex npm package, when an attacker is able to supply arbitrary input to the test() method

CWE-1333

How to fix

Remediation Available

semver-regexNVD

Affected:>= 4.0.0, < 4.0.3Fixed in:4.0.3CVE-2021-43307derived from NVD

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 ComplexityHigh

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

1.46%probability of exploitation in 30 days

70thpercentile

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

References

Exploit1

research.jfrog.com

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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.