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CVE-2026-19857— Formidable Forms < 6.35 - Unauthenticated Arbitrary Shortcode Execution via [entry_key] Custom HTML Token

Quick assessment

Affected
Unknown Formidable Forms
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.

Formidable Forms WordPress 插件在 6.35 版本之前，未能在将支持的令牌（token）替换到表单的自定义 HTML 时，阻止由请求派生的值传入 WordPress 短代码解析器。这使得未认证访问者可以在任何显示受影响表单的页面上，以攻击者选定的属性在服务器端执行任意短代码。

CVSS 4.8 · Medium EPSS 0.19% · P9

Affected Version Matrix 1

VendorProduct Version RangeStatus
Unknown Formidable Forms 6.34< 6.35 affected
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I. Basic Information for CVE-2026-19857

Vulnerability Information
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Vulnerability Title
Formidable Forms < 6.35 - Unauthenticated Arbitrary Shortcode Execution via [entry_key] Custom HTML Token
Source: CVE Program / CVE List V5
Vulnerability Description
The Formidable Forms WordPress plugin before 6.35 does not prevent a request-derived value from reaching the WordPress shortcode parser when it substitutes a supported token into a form's custom HTML, allowing unauthenticated visitors to have arbitrary shortcodes, with attacker-chosen attributes, executed server-side on any page displaying an affected form.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Unknown Formidable Forms 6.34 ~ 6.35 -

II. Public POCs for CVE-2026-19857

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III. Intelligence Information for CVE-2026-19857

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Vendor Advisories for CVE-2026-19857 (1)

Same Patch Batch · Unknown · 2026-09-16 · 46 CVEs total

CVE-2026-13407 6.1 MEDIUM Royal Elementor Addons < 1.7.1067 - Unauthenticated Stored HTML Injection in Form Notifica
CVE-2026-84906 5.3 MEDIUM Eventin < 4.1.24 - Unauthenticated Payment Bypass via Stripe and PayPal Cross-Order Transa
CVE-2026-86475 5.3 MEDIUM Appointment Hour Booking < 1.5.95 - Unauthenticated Booking Capacity Bypass via Multi-Appo
CVE-2026-76552 WP Import Export Lite < 3.9.33 - Authenticated Arbitrary File Upload via Remote Image Impo
CVE-2026-85349 FluentBoards < 2.0.15 - Subscriber+ Private Board Membership Disclosure via IDOR
CVE-2026-76555 WP Import Export Lite < 3.9.33 - Authenticated Sensitive File Disclosure via Existing File
CVE-2026-76557 WP Import Export Lite < 3.9.33 - Authenticated SQLi via Import Options
CVE-2026-76551 WP Import Export Lite < 3.9.33 - Authenticated RCE via Export Field PHP Function
CVE-2026-74926 MultiVendorX 5.0.0 - 5.0.15 - Subscriber+ Arbitrary Store Data and Ownership Overwrite via
CVE-2026-76553 WP Import Export Lite < 3.9.33 - Authenticated Arbitrary Directory Deletion via Template P
CVE-2026-78472 Ni WooCommerce Sales Report < 4.2.0 - Unauthenticated SQLi via 'sort' Parameter
CVE-2026-82124 Schema & Structured Data for WP & AMP < 1.66 - Unauthenticated Password-Protected Post Con
CVE-2026-77702 Eventin < 4.1.24 - Unauthenticated Ticket Price Rewrite via order_token
CVE-2026-84829 Optimole < 4.2.12 - Unauthenticated Stored XSS via Srcset Descriptor Parameter
CVE-2026-84905 Eventin < 4.1.24 - Contributor+ User Creation via Speaker Creation
CVE-2026-84088 Xpro Elementor Addons < 1.7.9 - Contributor+ Stored XSS via Interactive Circle Widget
CVE-2026-82126 Schema & Structured Data for WP & AMP 1.63 - 1.65 - Contributor+ Non-Public Post Content D
CVE-2026-82125 Schema & Structured Data for WP & AMP 1.46 - 1.65 - Unauthenticated Non-Public Comment Con
CVE-2026-84907 Eventin < 4.1.24 - Unauthenticated Order and Attendee Status Reset via Payment REST Endpoi
CVE-2026-76550 WP Import Export Lite < 3.9.34 - Authenticated RCE via Export Template Path Traversal

Showing top 20 of 46 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Formidable Forms
Same vendor: Unknown

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