What the vulnerability does
01Description
The JetFormBuilder plugin for WordPress is vulnerable to arbitrary file read via path traversal in all versions up to, and including, 3.5.6.2. This is due to the 'Uploaded_File::set_from_array' method accepting user-supplied file paths from the Media Field preset JSON payload without validating that the path belongs to the WordPress uploads directory. Combined with an insufficient same-file check in 'File_Tools::is_same_file' that only compares basenames, this makes it possible for unauthenticated attackers to exfiltrate arbitrary local files as email attachments by submitting a crafted form request when the form is configured with a Media Field and a Send Email action with file attachment.
Explanation of Vulnerability in Simple Terms
02Summary
JetFormBuilder versions up to 3.5.6.2 contain a path traversal vulnerability that allows unauthenticated attackers to read sensitive files from the server. The vulnerability requires no user interaction and can be exploited over the network. An attacker can access files outside the intended directory structure, potentially exposing configuration files, database credentials, or other sensitive data.
What an attacker can do
03Attacker Capabilities
Read arbitrary files from the server without authentication.
Potential impact on your site
04Site Impact
Sensitive files (config, credentials, private data) may be exposed to unauthenticated attackers.
Conditions required to exploit
05Prerequisites
Network access to the affected JetFormBuilder installation; no authentication or user interaction required.
Key dates
06Disclosure timeline
March 21, 2026
CVE published
April 8, 2026
Record updated
