Kirki – Freeform Page Builder, Website Builder & Customizer <= 6.3.1 - Unauthenticated Stored Cross-Site Scripting via Registration Metadata

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-102173
StatePUBLISHED
AssignerWordfence
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-07 06:16:33 UTC
Updated2026-10-07 13:24:53 UTC
DescriptionThe Kirki – Freeform Page Builder, Website Builder & Customizer plugin for WordPress is vulnerable to Stored Cross-Site Scripting via registration metadata in all versions up to, and including, 6.3.1 This is due to insufficient escaping in `ExceptionalElements::image_element()`, which concatenates a user-meta value straight into an `<img src="…">` attribute. This makes it possible for unauthenticated attackers to inject arbitrary web scripts that execute whenever a user accesses a page rendering a Kirki users collection whose image element is bound to one of the nine registration meta fields. Requires public user registration to be enabled and a published page carrying a `kirki-register` element, which prints the required element nonce into the public markup.

Risk And Classification

Primary CVSS: v3.1 7.2 HIGH from [email protected]

CVSS:3.1/AV:N/AC:L/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 ('Cross-site Scripting')

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary7.2HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
3.1CNADECLARED7.2HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

CVSS v3.1 Breakdown

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

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Themeum Kirki Freeform Page Builder Website Builder Customizer affected 6.3.1 semver Not specified

References

ReferenceSourceLinkTags
plugins.trac.wordpress.org/browser/kirki/tags/6.3.1/includes/Frontend/Preview/Exceptiona... [email protected] plugins.trac.wordpress.org
www.wordfence.com/threat-intel/vulnerabilities/id/368001e9-3806-41d5-902e-0facf... [email protected] www.wordfence.com
plugins.trac.wordpress.org/browser/kirki/tags/6.3.1/ComponentLibrary/controller/ElementG... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/kirki/tags/6.3.1/ComponentLibrary/controller/CompLibF... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/kirki/tags/6.3.1/ComponentLibrary/controller/CompLibF... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/kirki/tags/6.3.1/includes/HelperFunctions.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/kirki/tags/6.3.1/includes/Frontend/Preview/Exceptiona... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/kirki/tags/6.3.1/includes/Frontend/Preview/Utils.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/changeset/3718900/kirki/trunk/includes/Frontend/Preview/Excep... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/changeset [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/kirki/tags/6.3.1/ComponentLibrary/controller/CompLibF... [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: Hippolyte Quéré (Hippie) (Hippie) (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-09-28T19:14:50.000ZVendor Notified
CNA2026-10-06T16:28:09.000ZDisclosed

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