Summaryinfo

A vulnerability, which was classified as problematic, was found in jetmonsters JetFormBuilder Plugin up to 3.5.6.2 on WordPress. This issue affects the function Uploaded_File::set_from_array. Executing a manipulation can lead to absolute path traversal. This vulnerability is tracked as CVE-2026-4373. The attack can be launched remotely. No exploit exists.

Detailsinfo

A vulnerability was found in jetmonsters JetFormBuilder Plugin up to 3.5.6.2 on WordPress. It has been declared as problematic. This vulnerability affects the function Uploaded_File::set_from_array. The manipulation with an unknown input leads to a absolute path traversal vulnerability. The CWE definition for the vulnerability is CWE-36. The product uses external input to construct a pathname that should be within a restricted directory, but it does not properly neutralize absolute path sequences such as "/abs/path" that can resolve to a location that is outside of that directory. As an impact it is known to affect confidentiality. CVE summarizes:

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.

The weakness was disclosed by daroo. The advisory is shared for download at wordfence.com. This vulnerability was named CVE-2026-4373 since 03/18/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 03/21/2026). The MITRE ATT&CK project declares the attack technique as T1006.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-14240). Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• WordPress Plugin

Vendor

• jetmonsters

Name

• JetFormBuilder Plugin

Version

• 3.5.6.0
• 3.5.6.1
• 3.5.6.2

CPE 2.3info

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CPE 2.2info

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