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CVE-2026-17196— Super Forms <= 6.3.316 - Authenticated (Subscriber+) Arbitrary File Upload via 'extensions' Form Element Attribute

Quick assessment

Affected
WebRehab Super Forms – Drag & Drop 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 插件 Super Forms – Drag & Drop Form Builder 在所有不高于 6.3.316 的版本中，存在不受限制的文件类型上传漏洞，该漏洞位于 upload_files 函数中。 漏洞根源在于 upload_files 函数缺少对文件类型的验证，它会原样读取并应用攻击者控制的 文章元数据（post meta）中的扩展名字符串，将其用作允许的 MIME 类型映射。这使得具有订阅者（Subscriber）级及以上权限的认证攻击者能够上传可执行文件，从而可能导致远程代码执行（R

CVSS 8.8 · High
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I. Basic Information for CVE-2026-17196

Vulnerability Information
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Vulnerability Title
Super Forms <= 6.3.316 - Authenticated (Subscriber+) Arbitrary File Upload via 'extensions' Form Element Attribute
Source: CVE Program / CVE List V5
Vulnerability Description
The Super Forms – Drag & Drop Form Builder plugin for WordPress is vulnerable to Unrestricted File Type Upload in all versions up to, and including, 6.3.316 via the upload_files function. This is due to missing file type validation in the upload_files function, which reads and applies an attacker-controlled extensions string from _super_elements post meta verbatim as the allowed MIME type map. This makes it possible for authenticated attackers, with Subscriber-level access and above, to upload files that may be executable, which makes remote code execution possible. The attack requires a preceding step: poisoning the _super_elements post meta via the super_save_form AJAX handler, which lacks a capability and nonce check but requires the attacker to be authenticated as at minimum a Subscriber-level user; the subsequent file upload via super_upload_files requires no authentication at all.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/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

Affected Products

Vendor Product Affected Versions CPE Subscribe
WebRehab Super Forms – Drag & Drop Form Builder 0 ~ 6.3.316 -

II. Public POCs for CVE-2026-17196

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III. Intelligence Information for CVE-2026-17196

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Other References for CVE-2026-17196 (1)

IV. Related Vulnerabilities

Same product: Super Forms – Drag & Drop Form Builder
Same vendor: WebRehab
Same weakness: CWE-434

V. Comments for CVE-2026-17196

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