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CVE-2026-3481— WP Blockade <= 0.9.14 - Reflected Cross-Site Scripting via 'shortcode' Parameter

Quick assessment

Affected
burlingtonbytes WP Blockade – Visual Page 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和WordPress plugin都是WordPress基金会的产品。WordPress是一套使用PHP语言开发的博客平台。该平台具有在基于PHP和MySQL的服务器上架设个人博客网站的功能。WordPress plugin是一个应用插件。 WordPress plugin WP Blockade 0.9.14及之前版本存在跨站脚本漏洞，该漏洞源于render_shortcode_preview()函数中对 shortcode 参数的输入清理和输出转义不足，可能导致具有订阅者级别及以上访

CVSS 6.1 · Medium EPSS 0.25% · P16

Affected Version Matrix 1

VendorProduct Version RangeStatus
burlingtonbytes WP Blockade – Visual Page Builder ≤ 0.9.14 affected
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I. Basic Information for CVE-2026-3481

Vulnerability Information
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Vulnerability Title
WP Blockade <= 0.9.14 - Reflected Cross-Site Scripting via 'shortcode' Parameter
Source: CVE Program / CVE List V5
Vulnerability Description
The WP Blockade plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the 'shortcode' parameter in all versions up to and including 0.9.14. This is due to insufficient input sanitization and output escaping in the render_shortcode_preview() function. The function receives user input from $_GET['shortcode'], passes it through stripslashes() without any sanitization, and then outputs it directly via echo do_shortcode($shortcode) on line 393. When the input is not a valid WordPress shortcode (e.g., an HTML tag with JavaScript event handlers), do_shortcode() returns it unchanged, and it is reflected into the page without escaping. The endpoint is registered via admin_post_ (not admin_post_nopriv_), meaning it requires the user to be logged in with at minimum a Subscriber-level account. There is no nonce verification or additional capability check. This makes it possible for authenticated attackers, with Subscriber-level access and above, to inject arbitrary web scripts in pages that will execute if they can successfully trick a user into performing an action such as clicking a link.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/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 plugin WP Blockade 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WordPress和WordPress plugin都是WordPress基金会的产品。WordPress是一套使用PHP语言开发的博客平台。该平台具有在基于PHP和MySQL的服务器上架设个人博客网站的功能。WordPress plugin是一个应用插件。 WordPress plugin WP Blockade 0.9.14及之前版本存在跨站脚本漏洞，该漏洞源于render_shortcode_preview()函数中对 shortcode 参数的输入清理和输出转义不足，可能导致具有订阅者级别及以上访
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
burlingtonbytes WP Blockade – Visual Page Builder 0 ~ 0.9.14 -

II. Public POCs for CVE-2026-3481

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III. Intelligence Information for CVE-2026-3481

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Patches & Fixes for CVE-2026-3481 (2)

Vendor Advisories for CVE-2026-3481 (1)

IV. Related Vulnerabilities

Same product: WP Blockade – Visual Page Builder
Same vendor: burlingtonbytes
Same weakness: CWE-79

V. Comments for CVE-2026-3481

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