# CVE-2023-45851: Missing authorization in ctrlX HMI Web Panel - WR21 (WR2107)

> An attacker can force the Android client to connect to a malicious MQTT broker, allowing injection of fake messages to the HMI device.

- **Severity:** High 8.8 (`CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 25 Oct 2023
- **Updated:** 11 Sep 2024
- **Also known as:** GHSA-v7pg-gp89-mfh2

## What is CVE-2023-45851?

CVE-2023-45851 is a high-severity missing authorization vulnerability in Bosch Rexroth AG ctrlX HMI Web Panel - WR21 (WR2107), published on 25 Oct 2023. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

The Android Client application, when enrolled to the AppHub server,connects to an MQTT broker without enforcing any server authentication. 


This issue allows an attacker to force the Android Client application to connect to a malicious MQTT broker, enabling it to send fake messages to the HMI device

Weakness: CWE-306 (Missing Authentication for Critical Functionality)

## Which versions are affected by CVE-2023-45851?

It affects 3 products.


Products: Boschrexroth Ctrlx Hmi Web Panel Wr2107 Firmware, Boschrexroth Ctrlx Hmi Web Panel Wr2110 Firmware, Boschrexroth Ctrlx Hmi Web Panel Wr2115 Firmware.

## How do I fix CVE-2023-45851?

No fix has been published for CVE-2023-45851 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-45851 being exploited?

There is no known exploitation of CVE-2023-45851 in the wild and no public exploit code.

## Other vulnerabilities in Bosch Rexroth AG ctrlX HMI Web Panel - WR21 (WR2107)

- [CVE-2023-41255](https://insights.sbomify.com/CVE-2023-41255/): Missing authorization in ctrlX HMI Web Panel - WR21 (WR2107) (high 8.8)
- [CVE-2023-45220](https://insights.sbomify.com/CVE-2023-45220/): Information disclosure in ctrlX HMI Web Panel - WR21 (WR2107) (high 8.8)
- [CVE-2023-46102](https://insights.sbomify.com/CVE-2023-46102/): Hardcoded credentials in ctrlX HMI Web Panel - WR21 (WR2107) (high 8.8)
- [CVE-2023-45321](https://insights.sbomify.com/CVE-2023-45321/): Information disclosure in ctrlX HMI Web Panel - WR21 (WR2107) (high 8.3)
- [CVE-2023-43488](https://insights.sbomify.com/CVE-2023-43488/): Missing authorization in ctrlX HMI Web Panel - WR21 (WR2107) (high 7.9)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-45851 and fix it if it is affected.

What it is: CVE-2023-45851 is a high-severity missing authorization vulnerability in Bosch Rexroth AG ctrlX HMI Web Panel - WR21 (WR2107), published on 25 Oct 2023. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2023-45851 in the wild and no public exploit code.

Affected product: Bosch Rexroth AG ctrlX HMI Web Panel - WR21 (WR2107). 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-2023-45851/ (Markdown: https://insights.sbomify.com/CVE-2023-45851/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-45851
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-45851
- OSV: https://osv.dev/vulnerability/CVE-2023-45851

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From sbomify Insights: https://insights.sbomify.com/CVE-2023-45851/
Summaries are generated and may contain mistakes; the official description above is the record.