Bit Form <= 1.8.1 - Unauthenticated Arbitrary File Upload to Remote Code Execution

Unrestricted Upload of File with Dangerous Type
CVE CVE-2022-4774
CVSS 9.8 (Critical)
Publicly Published April 19, 2023
Last Updated January 22, 2024
Researcher Felipe Restrepo Rodriguez (pfelilpe) - Pfelilpe


The Bit Form plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the saveFormEntry function in versions up to, and including, 1.8.1. This makes it possible for unauthenticated attackers to upload arbitrary files on the affected site's server which may make remote code execution possible.



Vulnerability Details for Contact Form by Bit Form: Multi Step Form, Calculation Contact Form, Payment Contact Form & Custom Contact Form builder

Software Type Plugin
Software Slug bit-form (view on
Patched? Yes
Remediation Update to version 1.9, or a newer patched version
Affected Version
  • <= 1.8.1
Patched Version
  • 1.9

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