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CVE-2026-15983— Super Forms <= 6.3.316 - Authenticated (Subscriber+) Arbitrary File/Directory Deletion via 'subdir' / 'path' Parameter

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 的 Super Forms – Drag & Drop Form Builder 插件在所有版本（包括 6.3.316 及更早版本）中存在任意文件/目录删除漏洞。该漏洞的成因如下： 1. AJAX 处理器未执行任何权限检查，允许拥有订阅者（Subscriber）级别或更高权限的已认证用户创建或修改 Super Forms，并启用 设置； 2. 处理器中的 函数将攻击者通过 控制的 值未经任何净化直接传入 ； 3. 一个极易被绕过的 防护机制：当 值为 时， 会解析为 WordPress 根目录，

CVSS 8.1 · High
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I. Basic Information for CVE-2026-15983

Vulnerability Information
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Vulnerability Title
Super Forms <= 6.3.316 - Authenticated (Subscriber+) Arbitrary File/Directory Deletion via 'subdir' / 'path' Parameter
Source: CVE Program / CVE List V5
Vulnerability Description
The Super Forms – Drag & Drop Form Builder plugin for WordPress is vulnerable to Arbitrary File/Directory Deletion in all versions up to, and including, 6.3.316. This is due to the `super_save_form` AJAX handler performing no capability check — allowing Subscriber-level authenticated users to create or modify Super Forms and enable the `file_upload_submission_delete` setting — combined with the `super_submit_form` handler's `submit_form` function passing the attacker-controlled `files[].subdir` value from `$_POST['data']` directly into `SUPER_Common::delete_dir()` without sanitization, and a trivially bypassed `ABSPATH` guard that a `subdir` value of `wp-config.php` defeats because `dirname(realpath(ABSPATH . $subdir))` resolves to the WordPress root while the naive `ABSPATH !== $dir` string check fails to match due to a trailing-slash mismatch. This makes it possible for authenticated attackers, with Subscriber-level access and above, to recursively delete arbitrary files and directories on the server, up to and including the entire WordPress installation, resulting in full site takedown and potential remote code execution if critical files such as `wp-config.php` are removed and the site is subsequently re-installed by another party.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
文件名或路径的外部可控制
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-2026-15983

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III. Intelligence Information for CVE-2026-15983

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Other References for CVE-2026-15983 (2)

IV. Related Vulnerabilities

Same product: Super Forms – Drag & Drop Form Builder
Same vendor: WebRehab
Same weakness: CWE-73

V. Comments for CVE-2026-15983

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