CVE-2026-16779Network attack vector

Site configuration overwrite via missing capability check

Published Aug 16, 2026 · Updated Aug 16, 2026

Authorization bypass in Kubio AI Page Builder 2.8.5 and earlier allows remote authenticated users to overwrite site configuration. The kubio_restore_front_page AJAX action validates an editor nonce but performs no capability check, while window.kubioUtilsData exposes the nonce to block-editor users. Contributor-level access is sufficient to replace homepage options, menus, template parts, and Kubio global data without administrator approval.

CVSS severity4.3
Medium
EPSS probability0.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authorization bypass in Kubio AI Page Builder 2.8.5 and earlier allows remote authenticated users to overwrite site configuration. The kubio_restore_front_page AJAX action validates an editor nonce but performs no capability check, while window.kubioUtilsData exposes the nonce to block-editor users. Contributor-level access is sufficient to replace homepage options, menus, template parts, and Kubio global data without administrator approval.

The record

CVE
CVE-2026-16779
Published
Aug 16, 2026
Updated
Aug 16, 2026
Vendor
Extend Themes
Product
Kubio AI Page Builder
Classifications
CWE-862, T1491.002
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 16, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 16, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=2.8.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Extend Themes · Kubio AI Page Builderversion=0 <=2.8.5

Published CVSS scores

4.3WordfenceCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-862Missing Authorization
T1491.002External Defacement

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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