# CVE-2023-1748: CVE-2023-1748

> Hardcoded credentials in Nexx Smart Home devices allow unauthenticated attackers to access MQTT servers and remotely control garage doors or smart plugs.

- **Severity:** Critical 9.3 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 4 Apr 2023
- **Updated:** 16 Jan 2025
- **Also known as:** GHSA-jj5g-444x-7r89

## What is CVE-2023-1748?

CVE-2023-1748 is a critical vulnerability in Nexx Garage Door Controller NXG-100B, NXG-200, published on 4 Apr 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The listed versions of Nexx Smart Home devices use hard-coded credentials. An attacker with unauthenticated access to the Nexx Home mobile application or the affected firmware could view the credentials and access the MQ Telemetry Server (MQTT) server and the ability to remotely control garage doors or smart plugs for any customer.

Weakness: CWE-798 (Use of Hard-coded Credentials)

## Which versions are affected by CVE-2023-1748?

It affects 4 products.


Products: Getnexx Nxal-100 Firmware, Getnexx Nxg-100b Firmware, Getnexx Nxg-200 Firmware, Getnexx Nxpg-100w Firmware.

## How do I fix CVE-2023-1748?

No fix has been published for CVE-2023-1748 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-1748 being exploited?

There is no known exploitation of CVE-2023-1748 in the wild and no public exploit code.

## Other vulnerabilities in Nexx Garage Door Controller NXG-100B, NXG-200

- [CVE-2023-1752](https://insights.sbomify.com/CVE-2023-1752/): CVE-2023-1752 (high 8.1)
- [CVE-2023-1751](https://insights.sbomify.com/CVE-2023-1751/): CVE-2023-1751 (high 7.5)
- [CVE-2023-1750](https://insights.sbomify.com/CVE-2023-1750/): CVE-2023-1750 (high 7.1)
- [CVE-2023-1749](https://insights.sbomify.com/CVE-2023-1749/): CVE-2023-1749 (medium 6.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-1748 and fix it if it is affected.

What it is: CVE-2023-1748 is a critical vulnerability in Nexx Garage Door Controller NXG-100B, NXG-200, published on 4 Apr 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2023-1748 in the wild and no public exploit code.

Affected product: Nexx Garage Door Controller NXG-100B, NXG-200. 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-2023-1748/ (Markdown: https://insights.sbomify.com/CVE-2023-1748/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-1748
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-1748
- OSV: https://osv.dev/vulnerability/CVE-2023-1748

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-1748/
Summaries are generated and may contain mistakes; the official description above is the record.