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CVE-2026-14494— Sigma Forms Pro <= 1.4.5 - Unauthenticated Unauthenticated Arbitrary File Upload Leading to Remote Code Execution via Pre-built Template File Upload Field

Quick assessment

Affected
bdthemes SigmaForms Pro – AI Generated Forms
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.

bdthemes SigmaForms Pro是bdthemes公司的一款基于AI的WordPress表单构建插件。 bdthemes SigmaForms Pro 1.4.5及之前版本存在任意文件上传漏洞，该漏洞源于handle_form_submission函数在处理表单提交时动态授予所有用户unfiltered_upload权限，并绕过MIME类型验证，可能导致未经身份验证的攻击者在服务器上执行代码。

CVSS 9.8 · Critical EPSS 0.69% · P52

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
bdthemes SigmaForms Pro – AI Generated Forms ≤ 1.4.5 affected
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I. Basic Information for CVE-2026-14494

Vulnerability Information
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Vulnerability Title
Sigma Forms Pro <= 1.4.5 - Unauthenticated Unauthenticated Arbitrary File Upload Leading to Remote Code Execution via Pre-built Template File Upload Field
Source: CVE Program / CVE List V5
Vulnerability Description
The Sigma Forms Pro plugin for WordPress is vulnerable to Remote Code Execution in all versions up to, and including, 1.4.5 via the handle_form_submission function. This is due to the plugin dynamically granting the unfiltered_upload capability to all users during form submissions and bypassing MIME type validation when allowed_file_types is not configured. This makes it possible for unauthenticated attackers to execute code on the server. Several default pre-built templates including Job Application, Support Ticket, and Wholesale Application have file upload fields with no file type restrictions configured by design, making this vulnerability immediately exploitable upon installation.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
危险类型文件的不加限制上传
Source: CVE Program / CVE List V5
Vulnerability Title
bdthemes SigmaForms Pro 任意文件上传漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
bdthemes SigmaForms Pro是bdthemes公司的一款基于AI的WordPress表单构建插件。 bdthemes SigmaForms Pro 1.4.5及之前版本存在任意文件上传漏洞，该漏洞源于handle_form_submission函数在处理表单提交时动态授予所有用户unfiltered_upload权限，并绕过MIME类型验证，可能导致未经身份验证的攻击者在服务器上执行代码。
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
bdthemes SigmaForms Pro – AI Generated Forms 0 ~ 1.4.5 -

II. Public POCs for CVE-2026-14494

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III. Intelligence Information for CVE-2026-14494

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Vendor Advisories for CVE-2026-14494 (1)

Vendor Pages for CVE-2026-14494 (1)

IV. Related Vulnerabilities

Same product: SigmaForms Pro – AI Generated Forms
Same vendor: bdthemes
Same weakness: CWE-434

V. Comments for CVE-2026-14494

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