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

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-19861
StatePUBLISHED
AssignerWPScan
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-05 07:17:11 UTC
Updated2026-09-08 19:09:21 UTC
DescriptionThe 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.

Risk And Classification

Primary CVSS: v3.1 4.7 MEDIUM from ADP

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

EPSS: 0.001660000 probability, percentile 0.061390000 (date 2026-09-08)

Problem Types: CWE-79 | CWE-79 Cross-Site Scripting (XSS) | CWE-79 CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

VersionSourceTypeScoreSeverityVector
3.1ADPDECLARED4.7MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N
3.1134c704f-9b21-4f2e-91b3-4a467353bcc0Secondary4.7MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N

CVSS v3.1 Breakdown

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

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Unknown JetFormBuilder Dynamic Blocks Form Builder affected 3.6.5.2 semver Not specified

References

ReferenceSourceLinkTags
wpscan.com/vulnerability/c9c834a3-dc65-4972-9315-d4dcc7f26599 [email protected] wpscan.com
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: Sai Praneeth Koti (en)

CNA: WPScan (en)

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