JetFormBuilder <= 3.6.8 - Unauthenticated Stored Cross-Site Scripting via Dynamic Value Block `to_set` Property

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-121977
StatePUBLISHED
AssignerWordfence
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-11-07 12:17:45 UTC
Updated2026-11-07 12:17:45 UTC
DescriptionThe 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.

Risk And Classification

Primary CVSS: v3.1 5.4 MEDIUM from [email protected]

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

Problem Types: CWE-79 | CWE-79 CWE-79 Improper Neutralization of Input During Web Page Generation

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary5.4MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N
3.1CNADECLARED5.4MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Jetmonsters JetFormBuilder Dynamic Blocks Form Builder affected 3.6.8 semver Not specified

References

ReferenceSourceLinkTags
www.wordfence.com/threat-intel/vulnerabilities/id/f586a89a-7d1f-48ef-bbf6-0c781... [email protected] www.wordfence.com
plugins.trac.wordpress.org/browser/jetformbuilder/tags/3.6.8/assets/build/frontend/dynam... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/jetformbuilder/tags/3.6.8/includes/blocks/dynamic-val... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/changeset/3788241/jetformbuilder/trunk/includes/blocks/dynami... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/jetformbuilder/tags/3.6.8/includes/presets/sources/pr... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/jetformbuilder/tags/3.6.8/includes/functions.php [email protected] plugins.trac.wordpress.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: UKO (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-11-04T13:28:04.000ZVendor Notified
CNA2026-11-06T21:49:06.000ZDisclosed

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