Is CVE-2021-4285 in the CISA KEV catalog?

No. CVE-2021-4285 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-4285?

CVE-2021-4285 has a CVSS v3 base score of 3.5 (LOW).

What is the EPSS score for CVE-2021-4285?

CVE-2021-4285 has an EPSS score of 1.69% (74th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-4285?

Upgrade nagios cross platform agent to 2.4.0 or later.

CVE & CISA-KEV Catalog

CVE-2021-4285

LOWEPSS 74th pctl

3.5

CVSS v3

NVD

Description

A vulnerability classified as problematic was found in Nagios NCPA. This vulnerability affects unknown code of the file agent/listener/templates/tail.html. The manipulation of the argument name leads to cross site scripting. The attack can be initiated remotely. Upgrading to version 2.4.0 is able to address this issue. The name of the patch is 5abbcd7aa26e0fc815e6b2b0ffe1c15ef3e8fab5. It is recommended to upgrade the affected component. VDB-216874 is the identifier assigned to this vulnerability.

CWE-79Cross-Site Scripting (XSS)

How to fix

Remediation Available

nagios cross platform agentNVD

Affected:< 2.4.0Fixed in:2.4.0CVE-2021-4285derived 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 RequiredLow

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityLow

AvailabilityNone

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

Exploit Intelligence

1.69%probability of exploitation in 30 days

74thpercentile

Elevated risk: more likely to be exploited than 74% of all known CVEs.

References

Patch2

Third-Party Advisory3

Related Vulnerabilities

Other CWE-79 (Cross-Site Scripting (XSS)) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2020-11022	Medium	6.9	99%	-	Fix
CVE-2019-3929	Critical	9.8	99%	KEV	Fix
CVE-2020-9496	Medium	6.1	99%	-	-
CVE-2023-28341	Medium	6.1	99%	-	Fix
CVE-2018-12998	Medium	6.1	98%	-	-
CVE-2025-4123	High	7.6	98%	-	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.