# CVE-2023-53689: Nagios Fusion < 4.2.0 License Information Reflected XSS

> Reflected XSS in Nagios Fusion allows attackers to execute scripts in user browsers, potentially stealing credentials or performing unauthorized administrative actions.

- **Severity:** Medium 6.0 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:A/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **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-hfcv-97wg-h7wr

## What is CVE-2023-53689?

CVE-2023-53689 is a medium-severity cross-site scripting vulnerability in Nagios Fusion, published on 30 Oct 2025. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.

### Official description

Nagios Fusion versions prior to 4.2.0 contain a reflected cross-site scripting (XSS) vulnerability in the license key configuration flow that can result in execution of attacker-controlled script in the browser of a user who follows a crafted URL. While the application server itself is not directly corrupted by the reflected XSS, the resulting browser compromise can lead to credential/session theft and unauthorized administrative actions.

Weakness: CWE-79 (Improper Neutralization of Input During Web Page Generation)

## Which versions are affected by CVE-2023-53689?

It affects 1 product.


Products: Nagios Fusion.

## How do I fix CVE-2023-53689?

No fix has been published for CVE-2023-53689 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-53689 being exploited?

There is no known exploitation of CVE-2023-53689 in the wild and no public exploit code.

## Other vulnerabilities in Nagios Fusion

- [CVE-2020-28900](https://insights.sbomify.com/CVE-2020-28900/): Code injection in n/a (critical 9.8)
- [CVE-2020-28901](https://insights.sbomify.com/CVE-2020-28901/): Command injection in n/a (critical 9.8)
- [CVE-2020-28902](https://insights.sbomify.com/CVE-2020-28902/): Command injection in n/a (critical 9.8)
- [CVE-2020-28904](https://insights.sbomify.com/CVE-2020-28904/): Privilege escalation in n/a (critical 9.8)
- [CVE-2020-28907](https://insights.sbomify.com/CVE-2020-28907/): Security feature bypass in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-53689 and fix it if it is affected.

What it is: CVE-2023-53689 is a medium-severity cross-site scripting vulnerability in Nagios Fusion, published on 30 Oct 2025. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2023-53689 in the wild and no public exploit code.

Affected product: Nagios Fusion. 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-2023-53689/ (Markdown: https://insights.sbomify.com/CVE-2023-53689/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-53689
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-53689
- OSV: https://osv.dev/vulnerability/CVE-2023-53689

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-53689/
Summaries are generated and may contain mistakes; the official description above is the record.