Kubio AI Page Builder <= 2.8.5 - Missing Authorization to Authenticated (Contributor+) Front-Page/Menu/Template Configuration Reversion via kubio_restore_front_page AJAX Action

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-16779
StatePUBLISHED
AssignerWordfence
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-16 05:16:47 UTC
Updated2026-08-16 05:16:47 UTC
DescriptionThe Kubio AI Page Builder plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 2.8.5. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for authenticated attackers, with contributor-level access and above, to overwrite front-page configuration options (show_on_front, page_on_front, and page_for_posts), rewrite primary navigation menu items, replace template parts, and overwrite the Kubio global-data post. Although a nonce check via check_ajax_referer() is present, the nonce is unconditionally emitted into window.kubioUtilsData for every user who can load the block editor, making it harvestable by any Contributor and therefore an ineffective authorization barrier.

Risk And Classification

Primary CVSS: v3.1 4.3 MEDIUM from [email protected]

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

Problem Types: CWE-862 | CWE-862 CWE-862 Missing Authorization

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary4.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
3.1CNADECLARED4.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

CVSS v3.1 Breakdown

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

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Extendthemes Kubio AI Page Builder affected 2.8.5 semver Not specified

References

ReferenceSourceLinkTags
plugins.trac.wordpress.org/browser/kubio/tags/2.8.5/lib/kubio-block-library.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/changeset [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/kubio/tags/2.8.5/lib/src/Core/KubioFrontPageRevertNot... [email protected] plugins.trac.wordpress.org
www.wordfence.com/threat-intel/vulnerabilities/id/febca991-90a0-46b8-9609-2c8a7... [email protected] www.wordfence.com
plugins.trac.wordpress.org/browser/kubio/tags/2.8.5/lib/src/Core/KubioFrontPageRevertNot... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/kubio/tags/2.8.5/lib/editor-assets.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: Wordfence PRISM (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-07-23T17:34:10.000ZVendor Notified
CNA2026-08-15T15:33:07.000ZDisclosed

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