# CVE-2023-23937: Missing file upload type validation in pimcore/pimcore

> Authenticated attackers can upload malicious HTML files with JavaScript by bypassing content-type validation, leading to code execution in the victim's browser context.

- **Severity:** High 8.2 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 3 Feb 2023
- **Updated:** 10 Mar 2025
- **Also known as:** GHSA-8xv4-jj4h-qww6

## What is CVE-2023-23937?

CVE-2023-23937 is a high-severity vulnerability in Pimcore Pimcore, published on 3 Feb 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Pimcore is an Open Source Data & Experience Management Platform: PIM, MDM, CDP, DAM, DXP/CMS & Digital Commerce.
The upload functionality for updating user profile does not properly validate the file content-type, allowing any authenticated user to bypass this security check by adding a valid signature (p.e. GIF89) and sending any invalid content-type. This could allow an authenticated attacker to upload HTML files with JS content that will be executed in the context of the domain. This issue has been patched in version 10.5.16.

Weakness: CWE-434 (Unrestricted Upload of File with Dangerous Type)

## Which versions are affected by CVE-2023-23937?

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


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `pimcore/pimcore` | Packagist | All versions | 10.5.16 |
| `pimcore/pimcore` | Packagist | All versions | 10.5.16 |

Products: Pimcore Pimcore.

## How do I fix CVE-2023-23937?

Upgrade pimcore/pimcore to 10.5.16 or later.

## Is CVE-2023-23937 being exploited?

There is no known exploitation of CVE-2023-23937 in the wild and no public exploit code.

## Other vulnerabilities in Pimcore Pimcore

- [CVE-2022-39365](https://insights.sbomify.com/CVE-2022-39365/): RCE vulnerability in Pimcore/Mail & Dynamic Text Layout (critical 9.8)
- [CVE-2019-18981](https://insights.sbomify.com/CVE-2019-18981/): Pimcore Access Control Issues (critical 9.8)
- [CVE-2019-18985](https://insights.sbomify.com/CVE-2019-18985/): Pimcore 2FA Vulnerable to Brute Forcing (critical 9.8)
- [CVE-2026-23492](https://insights.sbomify.com/CVE-2026-23492/): Pimcore has a Blind SQL Injection in Admin Search Find API due to an incomplete fix for CVE-2023-30848 (high 8.8)
- [CVE-2023-47637](https://insights.sbomify.com/CVE-2023-47637/): SQL Injection in Admin Grid Filter API in Pimcore (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-23937 and fix it if it is affected.

What it is: CVE-2023-23937 is a high-severity vulnerability in Pimcore Pimcore, published on 3 Feb 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-2023-23937 in the wild and no public exploit code.

Affected packages and fixed versions:
- pimcore/pimcore (Packagist): affected all versions; fixed in 10.5.16
- pimcore/pimcore (Packagist): affected all versions; fixed in 10.5.16

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-2023-23937/ (Markdown: https://insights.sbomify.com/CVE-2023-23937/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-23937
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-23937
- OSV: https://osv.dev/vulnerability/CVE-2023-23937

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-23937/
Summaries are generated and may contain mistakes; the official description above is the record.