# CVE-2025-13827: GrapesJsBuilder File Upload allows all file uploads

> Attackers can upload arbitrary files via GrapesJS Builder, potentially achieving remote code execution if the media folder allows script execution.

- **Severity:** High 8.8 (`CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA: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:** 2 Dec 2025
- **Updated:** 2 Dec 2025
- **Also known as:** GHSA-5xw2-57jx-pgjp

## What is CVE-2025-13827?

CVE-2025-13827 is a high-severity vulnerability in Mautic, published on 2 Dec 2025. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

### Official description

Summary
Arbitrary files can be uploaded via the GrapesJS Builder, as the types of files that can be uploaded are not restricted. 
ImpactIf the media folder is not restricted from running files this can lead to a remote code execution.

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

## Which versions are affected by CVE-2025-13827?

6 open source packages ship an affected version, including mautic/grapes-js-builder-bundle.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `mautic/grapes-js-builder-bundle` | Packagist | From 4.0.0 | 4.4.18 |
| `mautic/grapes-js-builder-bundle` | Packagist | From 4.0.0 | 4.4.18 |
| `mautic/grapes-js-builder-bundle` | Packagist | From 5.0.0 | 5.2.9 |
| `mautic/grapes-js-builder-bundle` | Packagist | From 5.0.0 | 5.2.9 |
| `mautic/grapes-js-builder-bundle` | Packagist | From 6.0.0 | 6.0.7 |
| `mautic/grapes-js-builder-bundle` | Packagist | From 6.0.0 | 6.0.7 |

## How do I fix CVE-2025-13827?

Upgrade mautic/grapes-js-builder-bundle to a fixed version for your release line: 4.4.18, 5.2.9 or 6.0.7.

## Is CVE-2025-13827 being exploited?

There is no known exploitation of CVE-2025-13827 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-13827 and fix it if it is affected.

What it is: CVE-2025-13827 is a high-severity vulnerability in Mautic, published on 2 Dec 2025. 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-2025-13827 in the wild and no public exploit code.

Affected packages and fixed versions:
- mautic/grapes-js-builder-bundle (Packagist): affected from 4.0.0; fixed in 4.4.18
- mautic/grapes-js-builder-bundle (Packagist): affected from 4.0.0; fixed in 4.4.18
- mautic/grapes-js-builder-bundle (Packagist): affected from 5.0.0; fixed in 5.2.9
- mautic/grapes-js-builder-bundle (Packagist): affected from 5.0.0; fixed in 5.2.9
- mautic/grapes-js-builder-bundle (Packagist): affected from 6.0.0; fixed in 6.0.7
- mautic/grapes-js-builder-bundle (Packagist): affected from 6.0.0; fixed in 6.0.7

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-2025-13827/ (Markdown: https://insights.sbomify.com/CVE-2025-13827/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-13827
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-13827
- OSV: https://osv.dev/vulnerability/CVE-2025-13827

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-13827/
Summaries are generated and may contain mistakes; the official description above is the record.