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CVE-2026-96567— MW WP Form <= 5.1.7 - Unauthenticated Stored Cross-Site Scripting via 'post_id' Parameter (via stored form-submitted post meta)

Quick assessment

Affected
websoudan MW WP Form
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 MW WP Form 插件（所有 5.1.7 及更早版本）存在存储型跨站脚本（Stored XSS）漏洞，原因是 'post_id' 参数缺乏足够的输入清理和输出转义。这使得未认证的攻击者可以在页面上注入任意 Web 脚本，当用户访问被注入的页面时，脚本就会执行。 保护表单提交的 CSRF 验证机制（MW_WP_Form_Csrf）可以被任何未认证的访问者绕过：只需先加载公开表单页面以获取有效的“双提交”cookie，即可绕过验证，从而无法有效阻止恶意载荷被存储。

CVSS 7.2 · High EPSS 0.26% · P16

Affected Version Matrix 1

VendorProduct Version RangeStatus
websoudan MW WP Form ≤ 5.1.7 affected
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I. Basic Information for CVE-2026-96567

Vulnerability Information
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Vulnerability Title
MW WP Form <= 5.1.7 - Unauthenticated Stored Cross-Site Scripting via 'post_id' Parameter (via stored form-submitted post meta)
Source: CVE Program / CVE List V5
Vulnerability Description
The MW WP Form plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'post_id' parameter in all versions up to, and including, 5.1.7 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The CSRF gate protecting form submission (MW_WP_Form_Csrf) is bypassable by any unauthenticated visitor who first loads the public form page to obtain a valid double-submit cookie, leaving no effective barrier to storing malicious payloads.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
websoudan MW WP Form 0 ~ 5.1.7 -

II. Public POCs for CVE-2026-96567

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III. Intelligence Information for CVE-2026-96567

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Patches & Fixes for CVE-2026-96567 (6)

Vendor Advisories for CVE-2026-96567 (1)

IV. Related Vulnerabilities

Same product: MW WP Form
Same vendor: websoudan
Same weakness: CWE-79

V. Comments for CVE-2026-96567

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