The JetFormBuilder — Dynamic Blocks Form Builder plugin for WordPress is vulnerable to Reflected DOM-Based Cross-Site Scripting via the '<attacker-chosen query var name matching the preset's query_var setting>' parameter in all versions up to, and including, 3.6.6 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link. This is only exploitable on pages embedding a form that has a text field configured with a query_var Dynamic Preset and a data-jfb-macro or JFB_FIELD:: macro reference targeting that field, both of which are standard, documented plugin features.
History

Mon, 19 Oct 2026 09:15:00 +0000

Type Values Removed Values Added
First Time appeared Jetmonsters
Jetmonsters jetformbuilder
Wordpress-extensions
Wordpress-extensions jetformbuilder
Vendors & Products Jetmonsters
Jetmonsters jetformbuilder
Wordpress-extensions
Wordpress-extensions jetformbuilder

Sun, 11 Oct 2026 13:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Sat, 10 Oct 2026 05:45:00 +0000

Type Values Removed Values Added
Description The JetFormBuilder — Dynamic Blocks Form Builder plugin for WordPress is vulnerable to Reflected DOM-Based Cross-Site Scripting via the '<attacker-chosen query var name matching the preset's query_var setting>' parameter in all versions up to, and including, 3.6.6 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link. This is only exploitable on pages embedding a form that has a text field configured with a query_var Dynamic Preset and a data-jfb-macro or JFB_FIELD:: macro reference targeting that field, both of which are standard, documented plugin features.
Title JetFormBuilder <= 3.6.6 - Reflected DOM-Based Cross-Site Scripting via 'query_var' Dynamic Preset via data-jfb-macro / JFB_FIELD:: Macro Renderer
Weaknesses CWE-79
References
Metrics cvssV3_1

{'score': 4.7, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: Wordfence

Published: 2026-10-10T05:31:06.244Z

Updated: 2026-10-11T12:23:56.745Z

Reserved: 2026-10-01T14:17:25.176Z

Link: CVE-2026-103912

cve-icon Vulnrichment

Updated: 2026-10-11T12:15:04.638Z

cve-icon NVD

Status : Deferred

Published: 2026-10-10T06:16:38.447

Modified: 2026-10-13T13:30:21.620

Link: CVE-2026-103912

cve-icon Redhat

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