# CVE-2020-36867: Nagios XI < 5.7.3 Command Injection in Report PDF Download

> An authenticated attacker can inject shell commands via the report PDF download feature in Nagios XI, leading to remote code execution.

- **Severity:** High 8.7 (`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`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 30 Oct 2025
- **Updated:** 17 Nov 2025
- **Also known as:** GHSA-3qxh-pr59-jwh7

## What is CVE-2020-36867?

CVE-2020-36867 is a high-severity command injection vulnerability in Nagios Nagios Xi, published on 30 Oct 2025. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Nagios XI versions prior to 5.7.3 contain a command injection vulnerability in the report PDF download/export functionality. User-supplied values used in the PDF generation pipeline or the wrapper that invokes offline/pdf helper utilities were insufficiently validated or improperly escaped, allowing an authenticated attacker who can trigger PDF exports to inject shell metacharacters or arguments.

Weakness: CWE-78 (Improper Neutralization of Special Elements used in an OS Command)

## Which versions are affected by CVE-2020-36867?

It affects 1 product.


Products: Nagios Nagios Xi.

## How do I fix CVE-2020-36867?

No fix has been published for CVE-2020-36867 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-36867 being exploited?

There is no known exploitation of CVE-2020-36867 in the wild and no public exploit code.

## Other vulnerabilities in Nagios Nagios Xi

- [CVE-2021-25296](https://insights.sbomify.com/CVE-2021-25296/): Nagios XI OS Command Injection (high 8.8, exploited in the wild)
- [CVE-2021-25297](https://insights.sbomify.com/CVE-2021-25297/): Nagios XI OS Command Injection (high 8.8, exploited in the wild)
- [CVE-2021-25298](https://insights.sbomify.com/CVE-2021-25298/): Nagios XI OS Command Injection (high 8.8, exploited in the wild)
- [CVE-2019-15949](https://insights.sbomify.com/CVE-2019-15949/): Nagios XI Remote Code Execution (high 8.8, exploited in the wild)
- [CVE-2024-24401](https://insights.sbomify.com/CVE-2024-24401/): SQL injection in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-36867 and fix it if it is affected.

What it is: CVE-2020-36867 is a high-severity command injection vulnerability in Nagios Nagios Xi, published on 30 Oct 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2020-36867 in the wild and no public exploit code.

Affected product: Nagios Nagios Xi. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2020-36867/ (Markdown: https://insights.sbomify.com/CVE-2020-36867/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-36867
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-36867
- OSV: https://osv.dev/vulnerability/CVE-2020-36867

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-36867/
Summaries are generated and may contain mistakes; the official description above is the record.