CVE-2021-4285

Name: CVE-2021-4285
Creator: NVD / NIST
Published: 2022-12-27T11:15:10.48+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 1.69%

Last modified Jun 17, 2026

CVE-2021-4285 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. A vulnerability classified as problematic was found in Nagios NCPA. This vulnerability affects unknown code of the file agent/listener/templates/tail.html. EPSS estimates a 1.69% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

6.1/10

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

EPSS Probability

1.69%

74.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Nagios	Nagios Cross Platform Agent	< 2.4.0

References

https://github.com/NagiosEnterprises/ncpa/commit/5abbcd7aa26e0fc815e6b2b0ffe1c15ef3e8fab5Patch, Third Party Advisory
https://github.com/NagiosEnterprises/ncpa/pull/834Patch, Third Party Advisory
https://github.com/NagiosEnterprises/ncpa/releases/tag/v2.4.0Release Notes, Third Party Advisory
https://vuldb.com/?ctiid.216874Third Party Advisory
https://vuldb.com/?id.216874Third Party Advisory
https://github.com/NagiosEnterprises/ncpa/commit/5abbcd7aa26e0fc815e6b2b0ffe1c15ef3e8fab5Patch, Third Party Advisory
https://github.com/NagiosEnterprises/ncpa/pull/834Patch, Third Party Advisory
https://github.com/NagiosEnterprises/ncpa/releases/tag/v2.4.0Release Notes, Third Party Advisory
https://vuldb.com/?ctiid.216874Third Party Advisory
https://vuldb.com/?id.216874Third Party Advisory

Timeline

Published: Dec 27, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-4285?

How severe is CVE-2021-4285?

CVE-2021-4285 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 1.69% probability of exploitation in the next 30 days.

How do I fix CVE-2021-4285?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-4285?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST