# CVE-2021-25962: Shuup - Formula Injection in Checkout Addresses

> Attackers can execute arbitrary code via formula injection in checkout address fields when administrators export data to Excel.

- **Severity:** High 8.0 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** Yes
- **Published:** 29 Sep 2021
- **Updated:** 17 Sep 2024
- **Also known as:** GHSA-663j-rjcr-789f, PYSEC-2021-355

## What is CVE-2021-25962?

CVE-2021-25962 is a high-severity code injection vulnerability in shuup, published on 29 Sep 2021. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

### Official description

“Shuup” application in versions 0.4.2 to 2.10.8 is affected by the “Formula Injection” vulnerability. A customer can inject payloads in the name input field in the billing address while buying a product. When a store administrator accesses the reports page to export the data as an Excel file and opens it, the payload gets executed.

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

## Which versions are affected by CVE-2021-25962?

3 open source packages ship an affected version, including shuup. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `shuup` | PyPI | From 0.4.2 | 2.11.0 |
| `shuup` | PyPI | From 0.4.2 | 2.11.0 |
| `shuup` | PyPI | From 0.4.2 | 2.11.0 |

Products: Shuup Shuup.

## How do I fix CVE-2021-25962?

Upgrade shuup to 2.11.0 or later.

## Is CVE-2021-25962 being exploited?

There is no known exploitation of CVE-2021-25962 in the wild and no public exploit code.

## Other vulnerabilities in shuup

- [CVE-2021-25963](https://insights.sbomify.com/CVE-2021-25963/): Shuup - Reflected XSS in Error Page (medium 6.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-25962 and fix it if it is affected.

What it is: CVE-2021-25962 is a high-severity code injection vulnerability in shuup, published on 29 Sep 2021. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2021-25962 in the wild and no public exploit code.

Affected packages and fixed versions:
- shuup (PyPI): affected from 0.4.2; fixed in 2.11.0
- shuup (PyPI): affected from 0.4.2; fixed in 2.11.0
- shuup (PyPI): affected from 0.4.2; fixed in 2.11.0

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-2021-25962/ (Markdown: https://insights.sbomify.com/CVE-2021-25962/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-25962
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-25962
- OSV: https://osv.dev/vulnerability/CVE-2021-25962

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-25962/
Summaries are generated and may contain mistakes; the official description above is the record.