CVE-2026-4373 Details
Description
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.
A path traversal vulnerability allowing arbitrary file read has been identified in the JetFormBuilder plugin for WordPress, affecting all versions through 3.5.6.2. The issue arises because the 'Uploaded_File::set_from_array' method accepts user-supplied file paths from the Media Field preset JSON payload without proper validation to ensure the paths are within the WordPress uploads directory. This vulnerability is compounded by a flawed same-file check in 'File_Tools::is_same_file', which only compares file basenames. As a result, unauthenticated attackers can exploit this vulnerability to exfiltrate arbitrary local files as email attachments. This is achieved by sending a crafted form request with a Media Field and a Send Email action that includes file attachments.
Users are advised to update the JetFormBuilder plugin to version 3.5.6.3 or later, where this vulnerability has been patched.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Mar 21, 2026CISA-ADP
Assessed Mar 24, 2026References to Advisories, Solutions, and Tools
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Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-36 | Absolute Path Traversal | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| JetFormBuilder | <= 3.5.6.2 |
CPE
Remediation
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Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Mar 21, 2026 | New CVE Received | [email protected] |