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TI-2026-86560 Aliases CVE-2026-121977GHSA-3cp8-88h9-2m3w

Stored cross-site scripting in JetFormBuilder via Dynamic Value block

Priority LOW 22CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
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

JetFormBuilder, the Dynamic Blocks Form Builder plugin for WordPress, is affected up to and including 3.6.8. Missing input sanitization and output escaping of the note form field, which is stored as post meta, lets injected scripts persist (CWE-79). An unauthenticated attacker can inject arbitrary web scripts that run when a user with the edit_others_posts capability visits a form URL containing the attacker-created post ID, reached through a crafted phishing link.

Written with Claude Haiku 5.5 from the sources below · 2026-11-07

Description from the CNA

The JetFormBuilder — Dynamic Blocks Form Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'note (form field whose value is written to post meta `note`)' parameter in all versions up to, and including, 3.6.8 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. Successful exploitation requires a privileged user with the edit_others_posts capability to visit a form URL containing the attacker-created post ID, a delivery step the attacker controls via a crafted phishing link.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
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 3.6.8—No fix listedCNA
  • JetFormBuilder — Dynamic Blocks Form Builder Vendorjetmonsters Affected up to 3.6.8 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 · 2026-11-07

Timeline

  1. 2026-11-07 Threatist record created from CVE-2026-121977
  2. 2026-11-07 Alias added: GHSA-3cp8-88h9-2m3w
  3. 2026-11-07 CISA SSVC decision points changed
  4. 2026-11-07 Priority changed: MEDIUM → LOW

References

Other 6

  • 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