# CVE-2018-19508: Cross-site scripting in n/a

> An attacker can execute arbitrary scripts by uploading a malicious SVG file, potentially compromising user sessions or data.

- **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:** 19 Dec 2018
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-m7g6-7f8c-v654

## What is CVE-2018-19508?

CVE-2018-19508 is a medium-severity cross-site scripting vulnerability in n/a, published on 19 Dec 2018. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.

### Official description

CMSimple 4.7.5 has XSS via an admin's upload of an SVG file at a ?userfiles&subdir=userfiles/images/flags/ URI.

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

## Which versions are affected by CVE-2018-19508?

It affects 1 product.


Products: Cmsimple Cmsimple.

## How do I fix CVE-2018-19508?

No fix has been published for CVE-2018-19508 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-19508 being exploited?

There is no known exploitation of CVE-2018-19508 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2021-43741](https://insights.sbomify.com/CVE-2021-43741/): Path traversal in n/a (critical 9.8)
- [CVE-2024-57548](https://insights.sbomify.com/CVE-2024-57548/): Missing authorization in n/a (critical 9.1)
- [CVE-2021-47734](https://insights.sbomify.com/CVE-2021-47734/): CMSimple 5.4 Authenticated Local File Inclusion Remote Code Execution (high 8.6)
- [CVE-2021-47735](https://insights.sbomify.com/CVE-2021-47735/): CMSimple 5.4 Authenticated Remote Code Execution via Template Editing (high 8.6)
- [CVE-2024-58280](https://insights.sbomify.com/CVE-2024-58280/): CMSimple 5.15 Remote Command Execution via Extensions Configuration (high 8.6)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-19508 and fix it if it is affected.

What it is: CVE-2018-19508 is a medium-severity cross-site scripting vulnerability in n/a, published on 19 Dec 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-2018-19508 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-2018-19508/ (Markdown: https://insights.sbomify.com/CVE-2018-19508/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-19508
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-19508
- OSV: https://osv.dev/vulnerability/CVE-2018-19508

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-19508/
Summaries are generated and may contain mistakes; the official description above is the record.