Is CVE-2021-4295 in the CISA KEV catalog?

No. CVE-2021-4295 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-4295?

CVE-2021-4295 has a CVSS v3 base score of 5.5 (MEDIUM).

What is the EPSS score for CVE-2021-4295?

CVE-2021-4295 has an EPSS score of 0.72% (49th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-4295?

Upgrade code-validator-api to 1.0.31 or later.

CVE & CISA-KEV Catalog

CVE-2021-4295

MEDIUM

5.5

CVSS v3

NVD

Description

A vulnerability classified as problematic was found in ONC code-validator-api up to 1.0.30. This vulnerability affects the function vocabularyValidationConfigurations of the file src/main/java/org/sitenv/vocabularies/configuration/CodeValidatorApiConfiguration.java of the component XML Handler. The manipulation leads to xml external entity reference. Upgrading to version 1.0.31 is able to address this issue. The name of the patch is fbd8ea121755a2d3d116b13f235bc8b61d8449af. It is recommended to upgrade the affected component. VDB-217018 is the identifier assigned to this vulnerability.

CWE-611XML External Entity (XXE)

How to fix

Remediation Available

code-validator-apiNVD

Affected:< 1.0.31Fixed in:1.0.31CVE-2021-4295derived 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 VectorAdjacent

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityLow

IntegrityLow

AvailabilityLow

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

Exploit Intelligence

0.72%probability of exploitation in 30 days

49thpercentile

Moderate risk: more likely to be exploited than 49% of all known CVEs.

References

Patch1

github.com

Third-Party Advisory4

Related Vulnerabilities

Other CWE-611 (XML External Entity (XXE)) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2024-34102	Critical	9.8	100%	KEV	Fix
CVE-2019-9670	Critical	9.8	100%	KEV	Fix
CVE-2022-28219	Critical	9.8	97%	-	-
CVE-2024-22024	High	8.3	95%	-	-
CVE-2024-38653	High	7.5	92%	-	-
CVE-2017-12629	Critical	9.8	92%	-	Fix

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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.