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CVE-2025-13827 — grapes-js-builder-bundle

CVE-2025-13827 is a Unrestricted File Upload vulnerability in mautic/grapes-js-builder-bundle. A fix is available for mautic/grapes-js-builder-bundle — see the affected versions and patch details below.

GrapesJsBuilder File Upload allows all file uploads

Published
Updated
Affected
3 pkgs
Patched
3 / 3
Exploits
None indexed
Exploitation data as of Nov 5, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

No confirmed exploitation observed yet

  • A successful exploit gives an attacker total control of the affected component, not partial access.
  • CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.

Exploitation and automatability from CISA’s SSVC triage for CVE-2025-13827.

EPSS Exploitation Probability

via FIRST.org ↗
0.5%probability of exploitation in next 30 days
Lower Risk+0.03%
Lower risk than most CVEs39th percentile — riskier than 39% of all scored CVEsHighest risk
0.00%0.32%0.63%0.95%0.4%0.5%May 26Sep 26Nov 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

Real-World Exposure

3 pkgs affected
🐘mautic/grapes-js-builder-bundle🐘mautic/grapes-js-builder-bundle🐘mautic/grapes-js-builder-bundle

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Packagist packages — download data is not available via public APIs for these ecosystems.

Description

Summary

Arbitrary files can be uploaded via the GrapesJS Builder, as the types of files that can be uploaded are not restricted.

Impact

If the media folder is not restricted from running files this can lead to a remote code execution.

Affected Packages

3 total 3 fixed
EcosystemPackageVulnerable rangeFix
🐘Packagistmautic/grapes-js-builder-bundle≥ 4.0.0&&< 4.4.184.4.18composer require mautic/grapes-js-builder-bundle:^4.4.18
🐘Packagistmautic/grapes-js-builder-bundle≥ 5.0.0&&< 5.2.95.2.9composer require mautic/grapes-js-builder-bundle:^5.2.9
🐘Packagistmautic/grapes-js-builder-bundle≥ 6.0.0&&< 6.0.76.0.7composer require mautic/grapes-js-builder-bundle:^6.0.7

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for mautic/grapes-js-builder-bundle, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update mautic/grapes-js-builder-bundle to 4.4.18 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2025-13827 is resolved across your whole dependency graph.

  3. Workarounds

    Treat uploaded files as untrusted until proven otherwise: validate the actual content type rather than the supplied extension, store uploads outside the web root on a volume mounted without execute permission, and rename them to server-generated identifiers so an attacker cannot choose the path a request will later resolve.

Frequently Asked Questions

### Summary Arbitrary files can be uploaded via the GrapesJS Builder, as the types of files that can be uploaded are not restricted. ### Impact If the media folder is not restricted from running files this can lead to a remote code execution.
O3 Security · Impact-Aware SCA

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CVE-2025-13827: grapes-js-builder RCE — Fixed in 4.4.18