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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 Divi是WordPress基金会开源的一款可视化网页制作插件。 WordPress Divi 4.27.6及之前版本存在跨站脚本漏洞，该漏洞源于redirect_url参数被esc_attr()而非esc_url()清理，且未在$url_options数组中，可能允许具有Contributor级别及以上权限的经过身份验证的攻击者注入任意Web脚本，在用户提交联系表单时执行。

CVSS 6.4 · Medium EPSS 0.16% · P5

Affected Version Matrix 1

VendorProduct Version RangeStatus
Elegant Themes Divi ≤ 4.27.5 affected
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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 `$url_options` array in `class-et-builder-element.php`, so it does not receive `esc_url_raw()` sanitization during shortcode parsing. After a successful form submission, client-side JavaScript reads this data attribute and passes it directly to `window.location.href`, executing arbitrary JavaScript from a `javascript:` URI. This makes it possible for authenticated attackers, with Contributor-level access and above, to inject arbitrary web scripts in pages that execute whenever a user submits the contact form.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
WordPress Divi 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WordPress Divi是WordPress基金会开源的一款可视化网页制作插件。 WordPress Divi 4.27.6及之前版本存在跨站脚本漏洞，该漏洞源于redirect_url参数被esc_attr()而非esc_url()清理，且未在$url_options数组中，可能允许具有Contributor级别及以上权限的经过身份验证的攻击者注入任意Web脚本，在用户提交联系表单时执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

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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