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CVE-2026-15748— Forminator Forms <= 1.56.1 - Unauthenticated Arbitrary File Upload via Forged Upload Field Configuration

Quick assessment

Affected
wpmudev Forminator Forms – Contact Form, Payment Form & Custom Form Builder
Exploitation
High exploitation probability; assess promptly
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

WordPress Forminator Forms是WordPress基金会开源的一款表单构建插件。 WordPress Forminator Forms 1.56.1及之前版本存在任意文件上传漏洞，该漏洞源于handle_file_upload函数对文件类型验证不足，危险扩展名黑名单执行精确键匹配，可通过管道替代MIME类型键绕过，且公共提交处理器信任通过伪造Select字段值注入的攻击者控制的上传字段配置，可能导致未经身份验证的攻击者上传可执行文件，从而实现远程代码执行。

CVSS 9.8 · Critical EPSS 6.14% · P93

Affected Version Matrix 1

VendorProduct Version RangeStatus
wpmudev Forminator Forms – Contact Form, Payment Form & Custom Form Builder ≤ 1.56.1 affected
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I. Basic Information for CVE-2026-15748

Vulnerability Information
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Vulnerability Title
Forminator Forms <= 1.56.1 - Unauthenticated Arbitrary File Upload via Forged Upload Field Configuration
Source: CVE Program / CVE List V5
Vulnerability Description
The Forminator Forms plugin for WordPress is vulnerable to Arbitrary File Upload in all versions up to, and including, 1.56.1 via the handle_file_upload function. This is due to insufficient file type validation in handle_file_upload, where the dangerous-extension blocklist performs exact-key matching that is bypassed by pipe-alternative MIME type keys, combined with a public submission handler that trusts attacker-controlled upload field configuration injected via a forged Select field value. This makes it possible for unauthenticated attackers to upload files that may be executable, which makes remote code execution possible.
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
WordPress Forminator Forms 任意文件上传漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WordPress Forminator Forms是WordPress基金会开源的一款表单构建插件。 WordPress Forminator Forms 1.56.1及之前版本存在任意文件上传漏洞，该漏洞源于handle_file_upload函数对文件类型验证不足，危险扩展名黑名单执行精确键匹配，可通过管道替代MIME类型键绕过，且公共提交处理器信任通过伪造Select字段值注入的攻击者控制的上传字段配置，可能导致未经身份验证的攻击者上传可执行文件，从而实现远程代码执行。
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
wpmudev Forminator Forms – Contact Form, Payment Form & Custom Form Builder 0 ~ 1.56.1 -

II. Public POCs for CVE-2026-15748

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III. Intelligence Information for CVE-2026-15748

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Vendor Advisories for CVE-2026-15748 (1)

IV. Related Vulnerabilities

Same product: Forminator Forms – Contact Form, Payment Form & Custom Form Builder
Same vendor: wpmudev
Same weakness: CWE-434

V. Comments for CVE-2026-15748

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