# CVE-2018-3726: Cross-site Scripting (XSS) - Stored in crud-file-server

> An attacker can execute arbitrary scripts in the victim's browser via malicious file names in the crud-file-server Node.js module.

- **Severity:** Medium 6.1 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N`)
- **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:** Yes
- **Published:** 7 Jun 2018
- **Updated:** 17 Sep 2024
- **Also known as:** GHSA-h24f-9mm4-w336

## What is CVE-2018-3726?

CVE-2018-3726 is a medium-severity cross-site scripting vulnerability in HackerOne crud-file-server node module, published on 7 Jun 2018. 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

crud-file-server node module before 0.8.0 suffers from a Cross-Site Scripting vulnerability to a lack of validation of file names.

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

## Which versions are affected by CVE-2018-3726?

2 open source packages ship an affected version, including crud-file-server. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `crud-file-server` | npm | All versions | 0.8.0 |
| `crud-file-server` | npm | All versions | 0.8.0 |

Products: Crud-File-Server Project Crud-File-Server.

## How do I fix CVE-2018-3726?

Upgrade crud-file-server to 0.8.0 or later.

## Is CVE-2018-3726 being exploited?

There is no known exploitation of CVE-2018-3726 in the wild and no public exploit code.

## Other vulnerabilities in HackerOne crud-file-server node module

- [CVE-2018-3733](https://insights.sbomify.com/CVE-2018-3733/): Path Traversal in crud-file-server (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-3726 and fix it if it is affected.

What it is: CVE-2018-3726 is a medium-severity cross-site scripting vulnerability in HackerOne crud-file-server node module, published on 7 Jun 2018. 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-2018-3726 in the wild and no public exploit code.

Affected packages and fixed versions:
- crud-file-server (npm): affected all versions; fixed in 0.8.0
- crud-file-server (npm): affected all versions; fixed in 0.8.0

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-2018-3726/ (Markdown: https://insights.sbomify.com/CVE-2018-3726/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-3726
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-3726
- OSV: https://osv.dev/vulnerability/CVE-2018-3726

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-3726/
Summaries are generated and may contain mistakes; the official description above is the record.