# CVE-2023-1749: CVE-2023-1749

> Attackers with a valid device ID can execute unauthorized actions on Nexx Smart Home devices due to missing access controls.

- **Severity:** Medium 6.5 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 4 Apr 2023
- **Updated:** 16 Jan 2025
- **Also known as:** GHSA-83x8-hvhg-cvg7

## What is CVE-2023-1749?

CVE-2023-1749 is a medium-severity missing authorization vulnerability in Nexx Garage Door Controller NXG-100B, NXG-200, published on 4 Apr 2023. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

The listed versions of Nexx Smart Home devices lack proper access control when executing actions. An attacker with a valid NexxHome deviceId could send API requests that the affected devices would execute.

Weakness: CWE-639 (Authorization Bypass Through User-Controlled Key)

## Which versions are affected by CVE-2023-1749?

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-2023-1749?

No fix has been published for CVE-2023-1749 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-1749 being exploited?

There is no known exploitation of CVE-2023-1749 in the wild and no public exploit code.

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

- [CVE-2023-1748](https://insights.sbomify.com/CVE-2023-1748/): CVE-2023-1748 (critical 9.3)
- [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)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-1749 and fix it if it is affected.

What it is: CVE-2023-1749 is a medium-severity missing authorization vulnerability in Nexx Garage Door Controller NXG-100B, NXG-200, published on 4 Apr 2023. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2023-1749 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-2023-1749/ (Markdown: https://insights.sbomify.com/CVE-2023-1749/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-1749
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-1749
- OSV: https://osv.dev/vulnerability/CVE-2023-1749

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From sbomify Insights: https://insights.sbomify.com/CVE-2023-1749/
Summaries are generated and may contain mistakes; the official description above is the record.