# CVE-2023-34099: Improper mail validation in Shopware

> Attackers can register multiple accounts with distinct emails that resolve to the same address, potentially leading to account takeover.

- **Severity:** Medium 5.3 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 27 Jun 2023
- **Updated:** 7 Nov 2024
- **Also known as:** GHSA-gh66-fp7j-98v5

## What is CVE-2023-34099?

CVE-2023-34099 is a medium-severity vulnerability in Shopware Shopware, published on 27 Jun 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Shopware is an open source e-commerce software. The mail validation in the registration process had some flaws, so it was possible to construct different mail addresses, that in the end result in the same address, which is shared by multiple accounts. This issue has been addressed in version 5.7.18 and users are advised to update. There are no known workarounds for this vulnerability.

Weakness: CWE-754 (Improper Check for Unusual or Exceptional Conditions)

## Which versions are affected by CVE-2023-34099?

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


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `shopware/shopware` | Packagist | From 5.1.4 | 5.7.18 |
| `shopware/shopware` | Packagist | From 5.1.4 | 5.7.18 |

Products: Shopware Shopware.

## How do I fix CVE-2023-34099?

Upgrade shopware/shopware to 5.7.18 or later.

## Is CVE-2023-34099 being exploited?

There is no known exploitation of CVE-2023-34099 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-2023-34099 and fix it if it is affected.

What it is: CVE-2023-34099 is a medium-severity vulnerability in Shopware Shopware, published on 27 Jun 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2023-34099 in the wild and no public exploit code.

Affected packages and fixed versions:
- shopware/shopware (Packagist): affected from 5.1.4; fixed in 5.7.18
- shopware/shopware (Packagist): affected from 5.1.4; fixed in 5.7.18

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-2023-34099/ (Markdown: https://insights.sbomify.com/CVE-2023-34099/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-34099
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-34099
- OSV: https://osv.dev/vulnerability/CVE-2023-34099

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-34099/
Summaries are generated and may contain mistakes; the official description above is the record.