CVE-2026-103912Medium· 4.7▾ Sunlit

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 …

▾ Sunlit zone — Low / medium · no exploitation signal

Depth score26/ 100 · Low

impact 25.9 · likelihood 0 · exploitation 0

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Proof of concept

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Published

Oct 10, 2026

Updated

Oct 13, 2026

CVSS

4.7

Vendor

jetmonsters

Product

JetFormBuilder — Dynamic Blocks Form Builder

CWE

CWE-79

Depth score

26 · Low

EPSS

0.19% · p9

Platforms

—

Source

NVD

Vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N

CISA SSVC

decided 2026-10-11

Exploitation: none
Automatable: no
Technical impact: partial

Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.

EPSS history

Exploit-prediction probability, daily snapshots since Oct 11.

0.2% → 0.2%

Timeline

Disclosure to exploitation, from the record and what we observed since indexing it.

3 events · 3 days

Oct 10, 2026Published
Disclosed via NVD
Oct 11, 2026EPSS first tracked
0.2%
Oct 13, 2026Record revised
Last analysed / modified upstream

jetmonsters CWE-79 #nvd #cve.org

Affected

jetformbuilder_dynamic_blocks_form_builder <= 3.6.6

Full technical detail▾

Overview

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.

Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

References

Related vulnerabilities

Connected by shared product, vendor, weakness, or advisory.

#nvd#cve.org

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