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CVE-2026-3850— Divi <= 4.27.6 - Authenticated (Contributor+) Stored Cross-Site Scripting via Contact Form 'redirect_url' Shortcode Parameter

Quick assessment

Affected
Elegant Themes Divi
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 Divi 主题在所有版本（直至 4.27.6 及更早版本）中，通过 短代码的 参数存在存储型跨站脚本（Stored Cross-Site Scripting, XSS）漏洞。其成因在于： 属性在渲染到 HTML 的 数据属性之前，使用了 而非 进行净化；此外， 未包含在 中硬编码的 数组中，因此在短代码解析阶段未接受 的净化处理。在表单成功提交后，客户端 JavaScript 会读取该数据属性，并将其直接赋值给 ，从而可能执行来自 URI 的任意 JavaScript 代码。这使得拥有 Co

CVSS 6.4 · Medium
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I. Basic Information for CVE-2026-3850

Vulnerability Information
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Vulnerability Title
Divi <= 4.27.6 - Authenticated (Contributor+) Stored Cross-Site Scripting via Contact Form 'redirect_url' Shortcode Parameter
Source: CVE Program / CVE List V5
Vulnerability Description
The Divi theme for WordPress is vulnerable to Stored Cross-Site Scripting via the `redirect_url` parameter of the `et_pb_contact_form` shortcode in all versions up to, and including, 4.27.6. This is due to the `redirect_url` attribute being sanitized with `esc_attr()` instead of `esc_url()` before being rendered into the `data-redirect_url` HTML data attribute. Additionally, `redirect_url` is absent from the hardcoded `$url_options` array in `class-et-builder-element.php`, so it does not receive `esc_url_raw()` sanitization during shortcode parsing. After a successful form submission, client-side JavaScript reads this data attribute and passes it directly to `window.location.href`, executing arbitrary JavaScript from a `javascript:` URI. This makes it possible for authenticated attackers, with Contributor-level access and above, to inject arbitrary web scripts in pages that execute whenever a user submits the contact form.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/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
Elegant Themes Divi 0 ~ 4.27.5 -

II. Public POCs for CVE-2026-3850

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III. Intelligence Information for CVE-2026-3850

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Vendor Pages for CVE-2026-3850 (2)

IV. Related Vulnerabilities

Same product: Divi
Same vendor: Elegant Themes
Same weakness: CWE-79

V. Comments for CVE-2026-3850

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