Vulnerability 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.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://plugins.trac.wordpress.org/browser/jetformbuilder/tags/3.5.6.2/includes/
- https://plugins.trac.wordpress.org/browser/jetformbuilder/tags/3.5.6.2/modules/a
- https://plugins.trac.wordpress.org/browser/jetformbuilder/tags/3.5.6.2/modules/b
- https://plugins.trac.wordpress.org/changeset/3486996/jetformbuilder
- https://www.wordfence.com/threat-intel/vulnerabilities/id/1801fd3e-d56f-4540-970
FAQ
What is CVE-2026-4373?
CVE-2026-4373 is a vulnerability with a CVSS score of 7.5 (HIGH). 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...
How severe is CVE-2026-4373?
CVE-2026-4373 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-4373?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.