# CVE-2021-41824: CSV Injection Vulnerability

> Craft CMS allows CSV injection, enabling attackers to execute arbitrary commands when users open exported CSV files in spreadsheet applications.

- **Severity:** High 8.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** Yes
- **Published:** 29 Sep 2021
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-h7vq-5qgw-jwwq

## What is CVE-2021-41824?

CVE-2021-41824 is a high-severity vulnerability in Craftcms Craft Cms, published on 29 Sep 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

Craft CMS before 3.7.14 allows CSV injection.

Weakness: CWE-1236 (Improper Neutralization of Formula Elements in a CSV File)

## Which versions are affected by CVE-2021-41824?

2 open source packages ship an affected version, including craftcms/cms. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `craftcms/cms` | Packagist | From 3.4.0 | 3.7.14 |
| `craftcms/cms` | Packagist | From 3.4.0 | 3.7.14 |

Products: Craftcms Craft Cms.

## How do I fix CVE-2021-41824?

Upgrade craftcms/cms to 3.7.14 or later.

## Is CVE-2021-41824 being exploited?

There is no known exploitation of CVE-2021-41824 in the wild and no public exploit code.

## Other vulnerabilities in Craftcms Craft Cms

- [CVE-2025-32432](https://insights.sbomify.com/CVE-2025-32432/): Craft CMS Code Injection (critical 10.0, exploited in the wild)
- [CVE-2024-56145](https://insights.sbomify.com/CVE-2024-56145/): Craft CMS Code Injection (critical 9.3, exploited in the wild)
- [CVE-2025-23209](https://insights.sbomify.com/CVE-2025-23209/): Craft CMS Code Injection (high 8.1, exploited in the wild)
- [CVE-2025-35939](https://insights.sbomify.com/CVE-2025-35939/): Craft CMS External Control of Assumed-Immutable Web Parameter (medium 6.9, exploited in the wild)
- [CVE-2023-41892](https://insights.sbomify.com/CVE-2023-41892/): Craft CMS Remote Code Execution vulnerability (critical 10.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-41824 and fix it if it is affected.

What it is: CVE-2021-41824 is a high-severity vulnerability in Craftcms Craft Cms, published on 29 Sep 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2021-41824 in the wild and no public exploit code.

Affected packages and fixed versions:
- craftcms/cms (Packagist): affected from 3.4.0; fixed in 3.7.14
- craftcms/cms (Packagist): affected from 3.4.0; fixed in 3.7.14

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-2021-41824/ (Markdown: https://insights.sbomify.com/CVE-2021-41824/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-41824
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-41824
- OSV: https://osv.dev/vulnerability/CVE-2021-41824

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-41824/
Summaries are generated and may contain mistakes; the official description above is the record.