CVE-2026-4373
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.40%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- EPSS
- 0.40% probability · 33th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-36
- Source
- security@wordfence.com
References
- https://plugins.trac.wordpress.org/browser/jetformbuilder/tags/3.5.6.2/includes/classes/resources/uploaded-file.php#L99
- https://plugins.trac.wordpress.org/browser/jetformbuilder/tags/3.5.6.2/modules/actions-v2/send-email/send-email-action.php#L214
- https://plugins.trac.wordpress.org/browser/jetformbuilder/tags/3.5.6.2/modules/block-parsers/file-uploader.php#L313
- https://plugins.trac.wordpress.org/changeset/3486996/jetformbuilder
- https://www.wordfence.com/threat-intel/vulnerabilities/id/1801fd3e-d56f-4540-9700-9e9de8b465e1?source=cve
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.