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TI-2026-70240 Aliases CVE-2026-103912GHSA-rvj6-28rw-4w42

Reflected DOM-based cross-site scripting in JetFormBuilder

Priority LOW 21CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
High
Impact type
Cross-site scripting
Confidentiality · integrity · availability
Low · Low · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-79.

Summary

The JetFormBuilder (Dynamic Blocks Form Builder) plugin for WordPress is affected up to and including 3.6.6. Insufficient input sanitization and output escaping (CWE-79) let an attacker inject scripts through a query variable parameter that the page handles in the DOM. An unauthenticated attacker can run scripts in a victim's browser if the victim is tricked into clicking a link, but only on pages that embed a form with a text field configured with a query_var Dynamic Preset.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00193 9th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
jetmonstersJetFormBuilder — Dynamic Blocks Form Builderup to 3.6.6—No fix listedCNA
  • JetFormBuilder — Dynamic Blocks Form Builder Vendorjetmonsters Affected up to 3.6.6 Fixed in — No fix listed CNA

Remediation

The sources list no fixed version for JetFormBuilder (Dynamic Blocks Form Builder).

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Timeline

  1. 2026-10-10 Threatist record created from CVE-2026-103912
  2. 2026-10-10 Alias added: GHSA-rvj6-28rw-4w42
  3. 2026-10-11 CISA SSVC decision points changed

References

Other 5

  • TI-2024-04107 Hotel Booking Lite <= 4.11.1 - Unauthenticated PHP Object Injection CVSS 3.1CRITICAL 9.8
  • TI-2026-10932 JetFormBuilder <= 3.6.2 - Unauthenticated Privilege Escalation via '_jet_engine_booking_form_id' Parameter CVSS 3.1CRITICAL 9.8
  • TI-2024-03126 Timetable and Event Schedule by MotoPress <= 2.4.11 - Authenticated (Contributor+) SQL Injection CVSS 3.1CRITICAL 9.9
  • TI-2026-25053 WordPress JetFormBuilder plugin <= 3.5.6.1 - Remote Code Execution (RCE) vulnerability CVSS 3.1CRITICAL 9.9
  • TI-2025-40603 WordPress Hotel Booking Lite plugin <= 5.2.3 - Remote Code Execution (RCE) vulnerability CVSS 3.1CRITICAL 9.1
  • TI-2025-22116 WordPress Restaurant Menu by MotoPress plugin <= 2.4.4 - Local File Inclusion vulnerability CVSS 3.1HIGH 8.8
See all 47 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences