CVE-2026-19861: Unknown Jetformbuilder — Dynamic Blocks Form Builder

Medium severity, CVSS 4.7. EPSS: 0.2% chance of exploitation in the next 30 days.

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.

Affected products

• Unknown Jetformbuilder — Dynamic Blocks Form Builder: before 3.6.5.2 (fixed in 3.6.5.2)

Published 2026-09-05. Last modified 2026-09-08.