CVE-2026-103912JetFormBuilder <= 3.6.6 - Reflected DOM-Based Cross-Site Scripting via 'query_var' Dynamic Preset via data-jfb-macro / JFB_FIELD:: Macro Renderer
Updated under an hour ago ()
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It affects jetmonsters JetFormBuilder — Dynamic Blocks Form Builder. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 4.7 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N
- Weakness (CWE)
- CWE-79
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Wordfence
- NVD analysis
- Deferred
- Record last updated
- Oct 11, 2026
- First seen by InfoSec Signals
- Oct 10, 2026
Affected products
jetmonsters JetFormBuilder — Dynamic Blocks Form Builder jetmonsters:jetformbuilder_dynamic_blocks_form_builder (from the name) | through 3.6.6 | CNA record |
References
- https://www.wordfence.com/threat-intel/vulnerabilities/id/e75b6080-25e8-462c-b785-dbdacc10dfe6?source=cve
- https://plugins.trac.wordpress.org/browser/jetformbuilder/tags/3.6.6/assets/build/frontend/main.js
- https://plugins.trac.wordpress.org/browser/jetformbuilder/tags/3.6.6/includes/presets/sources/preset-source-query-var.php#L32
- https://plugins.trac.wordpress.org/browser/jetformbuilder/tags/3.6.6/includes/presets/sources/preset-source-query-var.php#L19
- https://plugins.trac.wordpress.org/changeset/3733851/jetformbuilder/trunk/assets/build/frontend/main.js
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.