# CVE-2019-9508: Vertiv Avocent UMG-4000 version 4.2.1.19 web interface is vulnerable to stored cross site scripting

> An authenticated administrator can inject malicious scripts via file names in the Vertiv Avocent UMG-4000 web interface, affecting users who view the page.

- **Severity:** Medium 6.3 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 30 Mar 2020
- **Updated:** 17 Sep 2024
- **Also known as:** GHSA-5hq8-wjj7-762c

## What is CVE-2019-9508?

CVE-2019-9508 is a medium-severity cross-site scripting vulnerability in Vertiv Avocent UMG-4000, published on 30 Mar 2020. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

The web interface of the Vertiv Avocent UMG-4000 version 4.2.1.19 is vulnerable to stored XSS. A remote attacker authenticated with an administrator account could store a maliciously named file within the web application that would execute each time a user browsed to the page.

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

## Which versions are affected by CVE-2019-9508?

It affects 1 product.


Products: Vertiv Avocent Umg-4000 Firmware.

## How do I fix CVE-2019-9508?

No fix has been published for CVE-2019-9508 yet. Limit exposure of the affected software until one is available.

## Is CVE-2019-9508 being exploited?

There is no known exploitation of CVE-2019-9508 in the wild and no public exploit code.

## Other vulnerabilities in Vertiv Avocent UMG-4000

- [CVE-2019-9507](https://insights.sbomify.com/CVE-2019-9507/): The web interface of the Vertiv Avocent UMG-4000 version 4.2.1.19 is vulnerable to arbitrary remote code execution (high 8.3)
- [CVE-2019-9509](https://insights.sbomify.com/CVE-2019-9509/): The web interface of the Vertiv Avocent UMG-4000 version 4.2.1.19 is vulnerable to reflected cross site scripting (medium 6.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-9508 and fix it if it is affected.

What it is: CVE-2019-9508 is a medium-severity cross-site scripting vulnerability in Vertiv Avocent UMG-4000, published on 30 Mar 2020. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2019-9508 in the wild and no public exploit code.

Affected product: Vertiv Avocent UMG-4000. 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-2019-9508/ (Markdown: https://insights.sbomify.com/CVE-2019-9508/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-9508
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-9508
- OSV: https://osv.dev/vulnerability/CVE-2019-9508

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From sbomify Insights: https://insights.sbomify.com/CVE-2019-9508/
Summaries are generated and may contain mistakes; the official description above is the record.