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CVE-2026-19769— Ninja Forms <= 3.15.1 - Unauthenticated Stored Cross-Site Scripting via Repeater Child 'type' Confusion via Unmatched Array Key

Quick assessment

Affected
kstover Ninja Forms – The Contact Form Builder That Grows With You
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 Ninja Forms – 与您一同成长的联系表单构建器插件，在 3.15.1 及之前的所有版本中，由于输入数据未充分净化且输出未正确转义，存在由 Repeater 子项中“type”字段混淆（源自未匹配的数组键）引发的存储型跨站脚本（Stored Cross-Site Scripting, XSS）漏洞。该漏洞允许未认证的攻击者注入任意 Web 脚本，当用户访问被注入的页面时，这些脚本将得以执行。 利用该漏洞需要 Ninja Forms 文件上传（File Uploads）附加插件处于激活

CVSS 7.2 · High
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I. Basic Information for CVE-2026-19769

Vulnerability Information
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Vulnerability Title
Ninja Forms <= 3.15.1 - Unauthenticated Stored Cross-Site Scripting via Repeater Child 'type' Confusion via Unmatched Array Key
Source: CVE Program / CVE List V5
Vulnerability Description
The Ninja Forms – The Contact Form Builder That Grows With You plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Repeater Child 'type' Confusion via Unmatched Array Key in all versions up to, and including, 3.15.1 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. Exploitation requires the Ninja Forms File Uploads add-on to be active, as the attack routes the unwhitelisted child entry through the File Uploads handler to write an attacker-supplied HTML file containing arbitrary JavaScript into any web-server-writable directory, including the site root, where it is served from the site's own origin.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/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
kstover Ninja Forms – The Contact Form Builder That Grows With You 0 ~ 3.15.1 -

II. Public POCs for CVE-2026-19769

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III. Intelligence Information for CVE-2026-19769

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Patches & Fixes for CVE-2026-19769 (3)

Vendor Pages for CVE-2026-19769 (1)

IV. Related Vulnerabilities

Same product: Ninja Forms – The Contact Form Builder That Grows With You
Same vendor: kstover
Same weakness: CWE-79

V. Comments for CVE-2026-19769

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