# CVE-2018-18694: Cross-site scripting in n/a

> Authenticated administrators can inject stored XSS via extensionless files in Monstra CMS, potentially leading to code execution or account takeover.

- **Severity:** Medium 4.8 (`CVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A: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:** 26 Oct 2018
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-x665-x9vv-q832

## What is CVE-2018-18694?

CVE-2018-18694 is a medium-severity cross-site scripting vulnerability in n/a, published on 26 Oct 2018. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.

### Official description

admin/index.php?id=filesmanager in Monstra CMS 3.0.4 allows remote authenticated administrators to trigger stored XSS via JavaScript content in a file whose name lacks an extension. Such a file is interpreted as text/html in certain cases.

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

## Which versions are affected by CVE-2018-18694?

It affects 1 product.


Products: Monstra Monstra.

## How do I fix CVE-2018-18694?

No fix has been published for CVE-2018-18694 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-18694 being exploited?

There is no known exploitation of CVE-2018-18694 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2021-40940](https://insights.sbomify.com/CVE-2021-40940/): File upload in n/a (critical 9.8)
- [CVE-2021-36548](https://insights.sbomify.com/CVE-2021-36548/): File upload in n/a (critical 9.8)
- [CVE-2020-25414](https://insights.sbomify.com/CVE-2020-25414/): Code injection in n/a (critical 9.8)
- [CVE-2020-13384](https://insights.sbomify.com/CVE-2020-13384/): File upload in n/a (high 8.8)
- [CVE-2018-16608](https://insights.sbomify.com/CVE-2018-16608/): Missing authorization in n/a (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-18694 and fix it if it is affected.

What it is: CVE-2018-18694 is a medium-severity cross-site scripting vulnerability in n/a, published on 26 Oct 2018. 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-2018-18694 in the wild and no public exploit code.

Affected product: n/a. 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-2018-18694/ (Markdown: https://insights.sbomify.com/CVE-2018-18694/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-18694
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-18694
- OSV: https://osv.dev/vulnerability/CVE-2018-18694

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-18694/
Summaries are generated and may contain mistakes; the official description above is the record.