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CVE-2026-103909— Calculated Fields Form <= 5.5.1.5 - Reflected DOM-Based Cross-Site Scripting via URL Parameter Substitution in Calculated Field Equation

Quick assessment

Affected
codepeople Calculated Fields Form – AI Form Builder for WordPress – Contact, Payment, Quote, Quiz & More
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“Calculated Fields Form – AI Form Builder for WordPress – Contact, Payment, Quote, Quiz & More”存在反射型基于 DOM 的跨站脚本漏洞（Reflected DOM-Based Cross-Site Scripting），该漏洞影响所有 5.5.1.5 及之前版本。漏洞原因是输入净化不足以及输出转义不充分，攻击者可通过 参数进行攻击。 此漏洞使得未认证的攻击者能够向网页中注入任意 Web 脚本，当用户

CVSS 6.1 · Medium EPSS 0.27% · P18

Affected Version Matrix 1

VendorProduct Version RangeStatus
codepeople Calculated Fields Form – AI Form Builder for WordPress – Contact, Payment, Quote, Quiz & More ≤ 5.5.1.5 affected
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I. Basic Information for CVE-2026-103909

Vulnerability Information
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Vulnerability Title
Calculated Fields Form <= 5.5.1.5 - Reflected DOM-Based Cross-Site Scripting via URL Parameter Substitution in Calculated Field Equation
Source: CVE Program / CVE List V5
Vulnerability Description
The Calculated Fields Form – AI Form Builder for WordPress – Contact, Payment, Quote, Quiz & More plugin for WordPress is vulnerable to Reflected DOM-Based Cross-Site Scripting via the 'arbitrary (whichever names the admin bound via url.<name>)' parameter in all versions up to, and including, 5.5.1.5 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. Exploitation requires the targeted site to host a publicly accessible form in which an administrator has configured at least two fields with url.&lt;name&gt; predefined values that are used together in a concatenation equation — a plausible but not universal configuration.
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
codepeople Calculated Fields Form – AI Form Builder for WordPress – Contact, Payment, Quote, Quiz & More 0 ~ 5.5.1.5 -

II. Public POCs for CVE-2026-103909

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III. Intelligence Information for CVE-2026-103909

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Patches & Fixes for CVE-2026-103909 (2)

News Coverage for CVE-2026-103909 (1)

IV. Related Vulnerabilities

Same product: Calculated Fields Form – AI Form Builder for WordPress – Contact, Payment, Quote, Quiz & More
Same vendor: codepeople
Same weakness: CWE-79

V. Comments for CVE-2026-103909

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