# CVE-2020-6090: Code injection in Wago

> An attacker with valid credentials can achieve remote code execution on WAGO PFC 200 controllers via crafted HTTP requests to the web management interface.

- **Severity:** High 7.2 (`CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 11 Jun 2020
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-pjg3-ch5q-948j

## What is CVE-2020-6090?

CVE-2020-6090 is a high-severity code injection vulnerability in Wago, published on 11 Jun 2020. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

An exploitable code execution vulnerability exists in the Web-Based Management (WBM) functionality of WAGO PFC 200 03.03.10(15). A specially crafted series of HTTP requests can cause code execution resulting in remote code execution. An attacker can make an authenticated HTTP request to trigger this vulnerability.

Weakness: CWE-345 (Insufficient Verification of Data Authenticity)

## Which versions are affected by CVE-2020-6090?

It affects 1 product.


Products: Wago Pfc200 Firmware.

## How do I fix CVE-2020-6090?

No fix has been published for CVE-2020-6090 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-6090 being exploited?

There is no known exploitation of CVE-2020-6090 in the wild and no public exploit code.

## Other vulnerabilities in Wago

- [CVE-2018-5459](https://insights.sbomify.com/CVE-2018-5459/): Auth bypass in WAGO PFC200 Series (critical 9.8)
- [CVE-2019-5160](https://insights.sbomify.com/CVE-2019-5160/): Server-side request forgery in WAGO PFC200 Firmware (critical 9.1)
- [CVE-2019-5161](https://insights.sbomify.com/CVE-2019-5161/): Code injection in WAGO PFC200 Firmware (critical 9.1)
- [CVE-2019-5184](https://insights.sbomify.com/CVE-2019-5184/): Use after free in Wago (high 7.8)
- [CVE-2019-5169](https://insights.sbomify.com/CVE-2019-5169/): Command injection in WAGO PFC200 (high 7.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-6090 and fix it if it is affected.

What it is: CVE-2020-6090 is a high-severity code injection vulnerability in Wago, published on 11 Jun 2020. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2020-6090 in the wild and no public exploit code.

Affected product: Wago. 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-2020-6090/ (Markdown: https://insights.sbomify.com/CVE-2020-6090/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-6090
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-6090
- OSV: https://osv.dev/vulnerability/CVE-2020-6090

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-6090/
Summaries are generated and may contain mistakes; the official description above is the record.