# CVE-2020-16230: Misconfiguration in HMS Networks Ewon Flexy and Cosy

> Attackers with local high privileges can inject scripts into CORS configuration to retrieve limited confidential information via sniffing.

- **Severity:** Low 2.3 (`CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 18 Sep 2020
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-m3wp-9jj9-qqp4

## What is CVE-2020-16230?

CVE-2020-16230 is a low-severity vulnerability in HMS Networks Ewon Flexy and Cosy, published on 18 Sep 2020. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

All version of Ewon Flexy and Cosy prior to 14.1 use wildcards such as (*) under which domains can request resources. An attacker with local access and high privileges could inject scripts into the Cross-origin Resource Sharing (CORS) configuration that could abuse this vulnerability, allowing the attacker to retrieve limited confidential information through sniffing.

## Which versions are affected by CVE-2020-16230?

It affects 2 products.


Products: Hms-Networks Ewon Cosy Firmware, Hms-Networks Ewon Flexy Firmware.

## How do I fix CVE-2020-16230?

No fix has been published for CVE-2020-16230 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-16230 being exploited?

There is no known exploitation of CVE-2020-16230 in the wild and no public exploit code.

## Other vulnerabilities in HMS Networks Ewon Flexy and Cosy

- [CVE-2020-10633](https://insights.sbomify.com/CVE-2020-10633/): Cross-site scripting in eWON Flexy and Cosy (medium 6.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-16230 and fix it if it is affected.

What it is: CVE-2020-16230 is a low-severity vulnerability in HMS Networks Ewon Flexy and Cosy, published on 18 Sep 2020. 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-2020-16230 in the wild and no public exploit code.

Affected product: HMS Networks Ewon Flexy and Cosy. 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-2020-16230/ (Markdown: https://insights.sbomify.com/CVE-2020-16230/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-16230
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-16230
- OSV: https://osv.dev/vulnerability/CVE-2020-16230

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-16230/
Summaries are generated and may contain mistakes; the official description above is the record.