# CVE-2021-41128: CSV Injection Vulnerability in Hygeia

> Attackers can inject malicious formulas into CSV exports that execute code when the file is opened, requiring an upgrade to Hygeia.

- **Severity:** Critical 9.1 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:L`)
- **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:** 6 Oct 2021
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-8pwv-jhj2-2369

## What is CVE-2021-41128?

CVE-2021-41128 is a critical code injection vulnerability in jshmrtn hygeia, published on 6 Oct 2021. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Hygeia is an application for collecting and processing personal and case data in connection with communicable diseases. In affected versions all CSV Exports (Statistics & BAG MED) contain a CSV Injection Vulnerability. Users of the system are able to submit formula as exported fields which then get executed upon ingestion of the exported file. There is no validation or sanitization of these formula fields and so malicious may construct malicious code. This vulnerability has been resolved in version 1.30.4. There are no workarounds and all users are advised to upgrade their package.

Weakness: CWE-74 (Improper Neutralization of Special Elements in Output Used by a Downstream Component)

## Which versions are affected by CVE-2021-41128?

It affects 1 product.


Products: Hygeia Project Hygeia.

## How do I fix CVE-2021-41128?

No fix has been published for CVE-2021-41128 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-41128 being exploited?

There is no known exploitation of CVE-2021-41128 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-41128 and fix it if it is affected.

What it is: CVE-2021-41128 is a critical code injection vulnerability in jshmrtn hygeia, published on 6 Oct 2021. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2021-41128 in the wild and no public exploit code.

Affected product: jshmrtn hygeia. 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-2021-41128/ (Markdown: https://insights.sbomify.com/CVE-2021-41128/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-41128
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-41128
- OSV: https://osv.dev/vulnerability/CVE-2021-41128

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-41128/
Summaries are generated and may contain mistakes; the official description above is the record.