# CVE-2021-47694: Nagios XI < 5.8.6 Core Config Manager (CCM) Reflected XSS via Test Command

> Attackers can inject arbitrary scripts via the Test Command feature, potentially executing code in victims' browsers and compromising accounts.

- **Severity:** Medium 5.1 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 30 Oct 2025
- **Updated:** 17 Nov 2025
- **Also known as:** GHSA-2mjm-mg2q-7whf

## What is CVE-2021-47694?

CVE-2021-47694 is a medium-severity cross-site scripting vulnerability in Nagios Nagios Xi, published on 30 Oct 2025. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

### Official description

The Core Config Manager (CCM) in Nagios XI versions prior to CCM 3.1.4 / Nagios XI 5.8.6 contains a reflected cross-site scripting (XSS) vulnerability via the Test Command functionality. Insufficient validation or escaping of user-supplied input may allow an attacker to inject and execute arbitrary script in the context of a victim's browser.

Weakness: CWE-79 (Improper Neutralization of Input During Web Page Generation), CWE-116 (Improper Encoding or Escaping of Output)

## Which versions are affected by CVE-2021-47694?

It affects 1 product.


Products: Nagios Nagios Xi.

## How do I fix CVE-2021-47694?

No fix has been published for CVE-2021-47694 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-47694 being exploited?

There is no known exploitation of CVE-2021-47694 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-2021-47694 and fix it if it is affected.

What it is: CVE-2021-47694 is a medium-severity cross-site scripting vulnerability in Nagios Nagios Xi, published on 30 Oct 2025. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2021-47694 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-2021-47694/ (Markdown: https://insights.sbomify.com/CVE-2021-47694/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-47694
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-47694
- OSV: https://osv.dev/vulnerability/CVE-2021-47694

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From sbomify Insights: https://insights.sbomify.com/CVE-2021-47694/
Summaries are generated and may contain mistakes; the official description above is the record.