# CVE-2020-13971: Shopware vulnerable to Cross-site Scripting

> Authenticated users can upload malicious SVG files leading to persistent XSS, allowing attackers to execute scripts in victim browsers.

- **Severity:** Medium 5.4 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N`)
- **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:** 28 Jul 2020
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-fxf3-wx3c-76pf

## What is CVE-2020-13971?

CVE-2020-13971 is a medium-severity cross-site scripting vulnerability in Shopware Shopware, published on 28 Jul 2020. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

### Official description

In Shopware before 6.2.3, authenticated users are allowed to use the Mediabrowser fileupload feature to upload SVG images containing JavaScript. This leads to Persistent XSS. An uploaded image can be accessed without authentication.

Weakness: CWE-79 (Improper Neutralization of Input During Web Page Generation)

## Which versions are affected by CVE-2020-13971?

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


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `shopware/platform` | Packagist | All versions | 6.2.3 |
| `shopware/platform` | Packagist | All versions | 6.2.3 |

Products: Shopware Shopware.

## How do I fix CVE-2020-13971?

Upgrade shopware/platform to 6.2.3 or later.

## Is CVE-2020-13971 being exploited?

There is no known exploitation of CVE-2020-13971 in the wild and no public exploit code.

## Other vulnerabilities in Shopware Shopware

- [CVE-2023-22731](https://insights.sbomify.com/CVE-2023-22731/): Improper Control of Generation of Code in Twig rendered views in shopware (critical 10.0)
- [CVE-2016-3109](https://insights.sbomify.com/CVE-2016-3109/): Shopware RCE Vulnerability (critical 9.8)
- [CVE-2024-22406](https://insights.sbomify.com/CVE-2024-22406/): Blind SQL-injection in DAL aggregations in Shopware (critical 9.3)
- [CVE-2021-32711](https://insights.sbomify.com/CVE-2021-32711/): Leak of information via Store-API (critical 9.1)
- [CVE-2026-31887](https://insights.sbomify.com/CVE-2026-31887/): Shopware unauthenticated data extraction possible through store-api.order endpoint (high 8.9)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-13971 and fix it if it is affected.

What it is: CVE-2020-13971 is a medium-severity cross-site scripting vulnerability in Shopware Shopware, published on 28 Jul 2020. 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-2020-13971 in the wild and no public exploit code.

Affected packages and fixed versions:
- shopware/platform (Packagist): affected all versions; fixed in 6.2.3
- shopware/platform (Packagist): affected all versions; fixed in 6.2.3

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-2020-13971/ (Markdown: https://insights.sbomify.com/CVE-2020-13971/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-13971
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-13971
- OSV: https://osv.dev/vulnerability/CVE-2020-13971

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-13971/
Summaries are generated and may contain mistakes; the official description above is the record.