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.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
None
No data modification
Availability
None
No disruption
CVSS Vector v3.1
Weakness Type (CWE)
References 5
https://plugins.trac.wordpress.org/browser/jetformbuilder/tags/3.5.6.2/includes…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/jetformbuilder/tags/3.5.6.2/modules/…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/jetformbuilder/tags/3.5.6.2/modules/…
security@wordfence.com
https://plugins.trac.wordpress.org/changeset/3486996/jetformbuilder
security@wordfence.com
https://www.wordfence.com/threat-intel/vulnerabilities/id/1801fd3e-d56f-4540-97…
security@wordfence.com