CVE-2026-19861— JetFormBuilder < 3.6.5.2 - Unauthenticated Stored XSS via WYSIWYG Field in Notification Emails
Quick assessment
Affected
Unknown JetFormBuilder — Dynamic Blocks 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.
JetFormBuilder — 动态块表单构建器 WordPress 插件在 3.6.5.2 版本之前，在将表单字段的值包含在其发送的 HTML 通知邮件中时，未对其进行适当的清理（sanitise）和转义（escape）。这使得未认证的用户能够向发送给管理员及其他收件人的邮件中注入任意 HTML 标签。注入的脚本是否执行取决于收件人的邮件客户端，但注入的 HTML 标记无论如何都会被渲染。
Possible ATT&CK Techniques 1 AI
T1567 · Exfiltration Over Web Service
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I. Basic Information for CVE-2026-19861
Vulnerability Information
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Vulnerability Title
JetFormBuilder < 3.6.5.2 - Unauthenticated Stored XSS via WYSIWYG Field in Notification Emails
Source: CVE Program / CVE List V5
Vulnerability Description
The JetFormBuilder — Dynamic Blocks Form Builder WordPress plugin before 3.6.5.2 does not properly sanitise and escape a form field's value before including it in the HTML notification emails it sends, allowing unauthenticated users to inject arbitrary HTML into messages delivered to administrators and other recipients. Whether injected script executes depends on the recipient's mail client, but the injected markup is rendered regardless.
Source: CVE Program / CVE List V5
CVSS Information
N/A
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 | JetFormBuilder — Dynamic Blocks Form Builder | 0 ~ 3.6.5.2 | - |
|
II. Public POCs for CVE-2026-19861
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Other References for CVE-2026-19861 (1)
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https://wpscan.com/vulnerability/c9c834a3-dc65-4972-9315-d4dcc7f26599/ exploit vdb-entry technical-description
Same Patch Batch · Unknown · 2026-09-05 · 34 CVEs total
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| CVE-2026-82846 | Masteriyo LMS 1.18.0 - 2.3.3 - Instructor+ Stored XSS via Course Custom Fields | |
| CVE-2026-82304 | Music Store – WordPress eCommerce < 1.4.5 - Unauthenticated SQLi via paypal-data Handler | |
| CVE-2026-81424 | Accept Stripe Payments < 2.1.4 - Unauthenticated Product Substitution via IDOR | |
| CVE-2026-83543 | Greenshift < 13.2.0 - Contributor+ SSRF via get-csv-to-json REST Endpoint | |
| CVE-2026-83544 | Greenshift < 13.2.0 - Contributor+ Stored XSS via Block Animation customProps Attribute | |
| CVE-2026-81423 | Accept Stripe Payments < 2.1.4 - Open Redirect via IPN Handler | |
| CVE-2026-81348 | My Private Site < 4.2.3 - Unauthenticated Sensitive Information Exposure via RSS Feeds and | |
| CVE-2026-81404 | IPGP Visitors Origin < 1.6 - Reflected XSS | |
| CVE-2026-84021 | Bold Page Builder < 5.9.8 - Contributor+ Stored XSS via bt_bb_button/bt_bb_headline/bt_bb_ | |
| CVE-2026-77826 | RegistrationMagic 5.0.1.8 - 6.0.9.8 - Unauthenticated Authentication Bypass via Missing Fa | |
| CVE-2026-78149 | Post Carousel 4.0.0 - 4.0.7 - Unauthenticated Password-Protected Post Content and post_pas | |
| CVE-2026-78150 | Post Carousel 4.0.0 - 4.0.7 - Contributor+ Private and Protected Post Content Disclosure v | |
| CVE-2026-15247 | Search Atlas SEO < 2.6.24 - Subscriber+ Google Service Account Credential Overwrite/Deleti | |
| CVE-2026-19858 | JetFormBuilder < 3.6.5.2 - Unauthenticated Password Hash and Arbitrary Metadata Disclosure | |
| CVE-2025-15694 | Joli Table Of Contents 2.0.0 - 2.8.0 - Admin+ Stored XSS | |
| CVE-2025-15693 | JCH Optimize 4.2.1 - 5.0.0 - Admin+ Path Traversal | |
| CVE-2026-84937 | YT Player < 2.1.0 - Contributor+ SQLi via ytp_ajax | |
| CVE-2026-84022 | Bold Page Builder < 5.9.8 - Contributor+ Stored XSS via Multiple Shortcode Element Attribu | |
| CVE-2026-84221 | Kirki 6.0.0 - 6.2.5 - Editor+ SQLi via Content Manager Field ID |
Showing top 20 of 34 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
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