# CVE-2022-47648: Auth bypass in B420

> An attacker can bypass authentication to access the control panel of the obsolete Bosch B420 module via IP-based authorization flaws.

- **Severity:** High 7.6 (`CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/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:** 8 Feb 2023
- **Updated:** 23 Jul 2025
- **Also known as:** GHSA-c56p-rh7r-f3v9

## What is CVE-2022-47648?

CVE-2022-47648 is a high-severity authentication bypass vulnerability in Bosch B420, published on 8 Feb 2023. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

An Improper Access Control vulnerability allows an attacker to access the control panel of the B420 without requiring any sort of authorization or authentication due to the IP based authorization. If an authorized user has accessed a publicly available B420 product using valid credentials, an insider attacker can gain access to the same panel without requiring any sort of authorization. The B420 module was already obsolete at the time this vulnerability was found (The End of Life announcement was made in 2013).

Weakness: CWE-290 (Authentication Bypass by Spoofing), CWE-284 (Improper Access Control)

## Which versions are affected by CVE-2022-47648?

It affects 1 product.


Products: Bosch B420 Firmware.

## How do I fix CVE-2022-47648?

No fix has been published for CVE-2022-47648 yet. Limit exposure of the affected software until one is available.

## Is CVE-2022-47648 being exploited?

There is no known exploitation of CVE-2022-47648 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-47648 and fix it if it is affected.

What it is: CVE-2022-47648 is a high-severity authentication bypass vulnerability in Bosch B420, published on 8 Feb 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-2022-47648 in the wild and no public exploit code.

Affected product: Bosch B420. 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-2022-47648/ (Markdown: https://insights.sbomify.com/CVE-2022-47648/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-47648
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-47648
- OSV: https://osv.dev/vulnerability/CVE-2022-47648

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-47648/
Summaries are generated and may contain mistakes; the official description above is the record.