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CVE-2026-4373— JetFormBuilder <= 3.5.6.2 - Unauthenticated Arbitrary File Read via Media Field

Quick assessment

Affected
jetmonsters JetFormBuilder — Dynamic Blocks Form Builder
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

WordPress和WordPress plugin都是WordPress基金会的产品。WordPress是一套使用PHP语言开发的博客平台。该平台具有在基于PHP和MySQL的服务器上架设个人博客网站的功能。WordPress plugin是一个应用插件。 WordPress plugin JetFormBuilder 3.5.6.2及之前版本存在安全漏洞，该漏洞源于接受用户提供的文件路径且同名文件检查不足，可能导致任意文件读取。

CVSS 7.5 · High EPSS 0.57% · P45
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I. Basic Information for CVE-2026-4373

Vulnerability Information
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Vulnerability Title
JetFormBuilder <= 3.5.6.2 - Unauthenticated Arbitrary File Read via Media Field
Source: CVE Program / CVE List V5
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
绝对路径遍历
Source: CVE Program / CVE List V5
Vulnerability Title
WordPress plugin JetFormBuilder 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WordPress和WordPress plugin都是WordPress基金会的产品。WordPress是一套使用PHP语言开发的博客平台。该平台具有在基于PHP和MySQL的服务器上架设个人博客网站的功能。WordPress plugin是一个应用插件。 WordPress plugin JetFormBuilder 3.5.6.2及之前版本存在安全漏洞，该漏洞源于接受用户提供的文件路径且同名文件检查不足，可能导致任意文件读取。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
jetmonsters JetFormBuilder — Dynamic Blocks Form Builder * ~ 3.5.6.2 -

II. Public POCs for CVE-2026-4373

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III. Intelligence Information for CVE-2026-4373

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Patches & Fixes for CVE-2026-4373 (4)

Vendor Advisories for CVE-2026-4373 (1)

IV. Related Vulnerabilities

Same product: JetFormBuilder — Dynamic Blocks Form Builder
Same vendor: jetmonsters
Same weakness: CWE-36

V. Comments for CVE-2026-4373

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