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TI-2026-16106 Aliases CVE-2026-19861GHSA-j6wc-w47f-c97j

JetFormBuilder < 3.6.5.2 - Unauthenticated Stored XSS via WYSIWYG Field in Notification Emails

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
Fixed

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

Summary

The JetFormBuilder — Dynamic Blocks Form Builder WordPress plugin before 3.6.5.2 does not properly sanitise and escape a form field's value before including it in the HTML notification emails it sends, allowing unauthenticated users to inject arbitrary HTML into messages delivered to administrators and other recipients. Whether injected script executes depends on the recipient's mail client, but the injected markup is rendered regardless.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00219 12th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix Fixed JetFormBuilder — Dynamic Blocks Form Builder (Unknown): 3.6.5.2

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
UnknownJetFormBuilder — Dynamic Blocks Form Builderbefore 3.6.5.23.6.5.2Patch availableCNA
  • JetFormBuilder — Dynamic Blocks Form Builder VendorUnknown Affected before 3.6.5.2 Fixed in 3.6.5.2 Patch available CNA

Remediation

  • Fix · CNA JetFormBuilder — Dynamic Blocks Form Builder (Unknown) Fixed in 3.6.5.2

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    JetFormBuilder — Dynamic Blocks Form Builder 3.6.5.2

    2 records Highest priority Priority LOW 2 LOW

    Other records, highest priority first

    • TI-2026-16103 JetFormBuilder < 3.6.5.2 - Unauthenticated Password Hash and Arbitrary Metadata Disclosure via Dynamic PresetPriority LOW 39
    Show all 2 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-19861
  2. 2026-10-03 Alias added: GHSA-j6wc-w47f-c97j

References

Exploit 1

Sources

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