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CVE-2026-101326— Ninja Forms <= 3.15.5 - Authenticated (Subscriber+) Arbitrary Shortcode Execution via '{wp:user_display_name}' Merge Tag via display_name

Quick assessment

Affected

kstover Ninja Forms – Contact Form Builder with Calculators, Quizzes, Signatures & AI Form 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 插件"The Ninja Forms – Contact Form Builder with Calculators, Quizzes, Signatures & AI Form Builder"在 3.15.5 及以下所有版本中存在任意短代码（shortcode）执行漏洞。该漏洞源于软件在执行函数前，未对用户触发的某个操作中的值进行充分验证。这使得拥有订阅者（Subscriber）及以上权限的已认证攻击者能够执行任意短代码。漏洞利用需满足以下条件：管理员已在公开可访问的页面上配置至少一个

CVSS 5.4 · Medium Updated Oct 31, 2026

Possible ATT&CK Techniques 2 AI

T1059 · Command and Scripting Interpreter T1190 · Exploit Public-Facing Application

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Vulnerability Information

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Vulnerability Title

Ninja Forms <= 3.15.5 - Authenticated (Subscriber+) Arbitrary Shortcode Execution via '{wp:user_display_name}' Merge Tag via display_name

Source: CVE Program / CVE List V5

Vulnerability Description

The The Ninja Forms – Contact Form Builder with Calculators, Quizzes, Signatures & AI Form Builder plugin for WordPress is vulnerable to arbitrary shortcode execution in all versions up to, and including, 3.15.5 This is due to the software allowing users to execute an action that does not properly validate a value before running do_shortcode. This makes it possible for authenticated attackers, with subscriber-level access and above, to execute arbitrary shortcodes. Exploitation requires that an administrator has configured at least one Ninja Forms field with its Default Value set to the {wp:user_display_name} merge tag on a publicly accessible page; a Subscriber need only set their display_name to a shortcode string via their profile and then visit that page.

Source: CVE Program / CVE List V5

CVSS Information

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

Source: CVE Program / CVE List V5

Vulnerability Type

对生成代码的控制不恰当(代码注入)

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
kstover	Ninja Forms – Contact Form Builder with Calculators, Quizzes, Signatures & AI Form Builder	0 ~ 3.15.5	-

II. Public POCs for CVE-2026-101326

#	POC Description	Source Link	Shenlong Link

AI-Generated POC Premium

No public POC found.

III. Intelligence Information for CVE-2026-101326

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Vendor Pages for CVE-2026-101326 (1)

🔗 Ninja Forms – The Contact Form Builder That Grows With You – WordPress plugin | WordPress.org Read full article

Other References for CVE-2026-101326 (7)

https://www.cve.org/CVERecord?id=CVE-2026-101326

Same Patch Batch · kstover · 2026-10-31 · 3 CVEs total

CVE-2026-109997	7.2 HIGH	Ninja Forms <= 3.15.5 - Unauthenticated Stored Cross-Site Scripting via 'extra' Parameter
CVE-2026-100155	6.5 MEDIUM	Ninja Forms <= 3.15.5 - Unauthenticated Arbitrary Shortcode Execution via 'formData' Field

IV. Related Vulnerabilities

Same product: Ninja Forms – Contact Form Builder with Calculators, Quizzes, Signatures & AI Form Builder

Same vendor: kstover

Same weakness: CWE-94