# CVE-2021-37833: Cross-site scripting in n/a

> Reflected XSS in Hotel Druid allows attackers to execute arbitrary JavaScript commands in victim browsers.

- **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:** 3 Aug 2021
- **Updated:** 4 Aug 2024
- **Also known as:** DEBIAN-CVE-2021-37833, GHSA-43cj-cr8f-9vfw, UBUNTU-CVE-2021-37833

## What is CVE-2021-37833?

CVE-2021-37833 is a medium-severity cross-site scripting vulnerability in n/a, published on 3 Aug 2021. 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

A reflected cross-site scripting (XSS) vulnerability exists in multiple pages in version 3.0.2 of the Hotel Druid application that allows for arbitrary execution of JavaScript commands.

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

## Which versions are affected by CVE-2021-37833?

It affects 1 product.


Products: Digitaldruid Hoteldruid.

## How do I fix CVE-2021-37833?

Upgrade to a fixed version.

## Is CVE-2021-37833 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-37833 exists.

Public exploit code:

- CVE 2021-37833 Hotel Druid 3.0.2 Reflected Cross Site Scripting (github_poc): https://github.com/dievus/CVE-2021-37833
- Hotel Druid 3.0.2 - Cross-Site Scripting (nuclei): http/cves/2021/CVE-2021-37833.yaml

## Other vulnerabilities in n/a

- [CVE-2023-43371](https://insights.sbomify.com/CVE-2023-43371/): SQL injection in n/a (critical 9.8)
- [CVE-2023-43373](https://insights.sbomify.com/CVE-2023-43373/): SQL injection in n/a (critical 9.8)
- [CVE-2023-43374](https://insights.sbomify.com/CVE-2023-43374/): SQL injection in n/a (critical 9.8)
- [CVE-2023-43375](https://insights.sbomify.com/CVE-2023-43375/): SQL injection in n/a (critical 9.8)
- [CVE-2021-42949](https://insights.sbomify.com/CVE-2021-42949/): Auth bypass in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-37833 and fix it if it is affected.

What it is: CVE-2021-37833 is a medium-severity cross-site scripting vulnerability in n/a, published on 3 Aug 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-37833 exists.

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-2021-37833/ (Markdown: https://insights.sbomify.com/CVE-2021-37833/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-37833
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-37833
- OSV: https://osv.dev/vulnerability/CVE-2021-37833

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-37833/
Summaries are generated and may contain mistakes; the official description above is the record.