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CVE-2026-18409— WPForms Pro <= 2.0.0.2 - Unauthenticated Stored Cross-Site Scripting via Single Line Text and Paragraph Text Field Values

Quick assessment

Affected
WPForms WPForms Pro
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 WPForms Pro 插件存在存储型跨站脚本（Stored XSS）漏洞。该漏洞存在于所有 2.0.0.2 及以下版本中，原因在于对用户输入的“单行文本”和“段落文本”字段值缺乏足够的输入清理和输出转义。这使得未认证的攻击者能够在页面中注入任意 Web 脚本，当用户访问被植入脚本的页面时，这些脚本便会执行。 该利用过程依赖于插件自身使用的 过滤器，该过滤器将 安全过滤器的白名单放宽，允许包含 属性的 元素。由于 属性不在 WordPress 的 URI 属性清理列表内，因此存储在 中的 协

CVSS 7.2 · High EPSS 0.23% · P14

Affected Version Matrix 1

VendorProduct Version RangeStatus
WPForms WPForms Pro ≤ 2.0.0.2 affected
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I. Basic Information for CVE-2026-18409

Vulnerability Information
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Vulnerability Title
WPForms Pro <= 2.0.0.2 - Unauthenticated Stored Cross-Site Scripting via Single Line Text and Paragraph Text Field Values
Source: CVE Program / CVE List V5
Vulnerability Description
The WPForms Pro plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Single Line Text and Paragraph Text Field Values in all versions up to, and including, 2.0.0.2 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 exploit relies on the plugin's own wp_kses_allowed_html filter widening the 'post' allowlist to permit iframe elements with a data-src attribute, which is not on WordPress's URI-attribute sanitization list, allowing a javascript: URI stored in data-src to survive kses processing and subsequently be promoted to a live src attribute by the bundled admin script view-entry.min.js.
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
WPForms WPForms Pro 0 ~ 2.0.0.2 -

II. Public POCs for CVE-2026-18409

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III. Intelligence Information for CVE-2026-18409

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Vendor Advisories for CVE-2026-18409 (1)

Other References for CVE-2026-18409 (1)

IV. Related Vulnerabilities

Same product: WPForms Pro
Same vendor: WPForms
Same weakness: CWE-79

V. Comments for CVE-2026-18409

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