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CVE-2026-118500— Cool FormKit Lite <= 2.7.9 - Authenticated (Contributor+) Stored DOM-Based Cross-Site Scripting via Form Field custom_id Parameter

Quick assessment

Affected
coolplugins Cool FormKit Lite – Advanced Form Builder for Elementor
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 插件"Cool FormKit Lite – Elementor 高级表单构建器”在所有 2.7.9 及更早版本中，由于输入清理和输出转义不足，存在通过参数 引发的存储型基于 DOM 的跨站脚本攻击（Stored DOM-Based XSS）漏洞。该漏洞允许拥有贡献者（Contributor）级别及以上权限的已认证攻击者，在页面中注入任意 Web 脚本；当任何用户访问被注入的页面时，这些脚本将被执行。 尽管服务器端在输出时调用了 进行转义，但该防护被绕过：当 jQuery 的 方法提取模板时，H

CVSS 6.4 · Medium
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I. Basic Information for CVE-2026-118500

Vulnerability Information
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Vulnerability Title
Cool FormKit Lite <= 2.7.9 - Authenticated (Contributor+) Stored DOM-Based Cross-Site Scripting via Form Field custom_id Parameter
Source: CVE Program / CVE List V5
Vulnerability Description
The Cool FormKit Lite – Advanced Form Builder for Elementor plugin for WordPress is vulnerable to Stored DOM-Based Cross-Site Scripting via the '_elementor_data.form_fields[].custom_id' parameter in all versions up to, and including, 2.7.9 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The esc_html() call applied at server emission is bypassed because the HTML fragment-serialization algorithm restores &quot; to a raw double-quote inside text nodes when jQuery .html() extracts the template, allowing the attacker-controlled custom_id to break out of an HTML attribute context within the plugin's own frontend script.
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
coolplugins Cool FormKit Lite – Advanced Form Builder for Elementor 0 ~ 2.7.9 -

II. Public POCs for CVE-2026-118500

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III. Intelligence Information for CVE-2026-118500

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Other References for CVE-2026-118500 (7)

IV. Related Vulnerabilities

Same vendor: coolplugins
Same weakness: CWE-79