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CVE-2026-18843— Beaver Builder Plugin (Pro Version) <= 2.11.0.1 - Reflected Cross-Site Scripting via 'no_results_message' node_preview Parameter

Quick assessment

Affected
The Beaver Builder Team Beaver Builder Plugin (Starter Version)
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 Beaver Builder 插件（Starter 版本）在所有版本中（包括 2.11.0.1 及更早版本）存在通过 参数中的 引发的反射型跨站脚本攻击（Reflected Cross-Site Scripting, XSS）漏洞，原因是输入验证不足且输出未正确转义。这使得未经身份验证的攻击者能够成功诱使用户执行某个操作（例如点击一个包含恶意脚本的链接），从而在网页中注入任意 Web 脚本并使其执行。

CVSS 6.1 · Medium
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I. Basic Information for CVE-2026-18843

Vulnerability Information
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Vulnerability Title
Beaver Builder Plugin (Pro Version) <= 2.11.0.1 - Reflected Cross-Site Scripting via 'no_results_message' node_preview Parameter
Source: CVE Program / CVE List V5
Vulnerability Description
The Beaver Builder Plugin (Starter Version) plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via 'no_results_message' node_preview Parameter in all versions up to, and including, 2.11.0.1 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on 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

Affected Products

Vendor Product Affected Versions CPE Subscribe
The Beaver Builder Team Beaver Builder Plugin (Starter Version) 0 ~ 2.11.0.1 -

II. Public POCs for CVE-2026-18843

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III. Intelligence Information for CVE-2026-18843

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Vendor Pages for CVE-2026-18843 (2)

IV. Related Vulnerabilities

Same product: Beaver Builder Plugin (Starter Version)
Same vendor: The Beaver Builder Team
Same weakness: CWE-79

V. Comments for CVE-2026-18843

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