Is CVE-2021-23901 in the CISA KEV catalog?

No. CVE-2021-23901 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-23901?

CVE-2021-23901 has a CVSS v3 base score of 9.1 (CRITICAL).

What is the EPSS score for CVE-2021-23901?

CVE-2021-23901 has an EPSS score of 4.36% (90th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-23901?

Upgrade nutch to 1.18 or later.

CVE & CISA-KEV Catalog

CVE-2021-23901

CRITICALEPSS 90th pctl

9.1

CVSS v3

NVD

Description

An XML external entity (XXE) injection vulnerability was discovered in the Nutch DmozParser and is known to affect Nutch versions < 1.18. XML external entity injection (also known as XXE) is a web security vulnerability that allows an attacker to interfere with an application's processing of XML data. It often allows an attacker to view files on the application server filesystem, and to interact with any back-end or external systems that the application itself can access. This issue is fixed in Apache Nutch 1.18.

CWE-611XML External Entity (XXE)

How to fix

Remediation Available

nutchNVD

Affected:< 1.18Fixed in:1.18CVE-2021-23901derived 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 ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityNone

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

Exploit Intelligence

4.36%probability of exploitation in 30 days

90thpercentile

High risk: more likely to be exploited than 90% of all known CVEs.

References

Patch1

issues.apache.org

Vendor Advisory1

lists.apache.org

Third-Party Advisory1

security.netapp.com

Other references2

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.