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CVE-2026-16779— 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

Quick assessment

Affected
extendthemes Kubio AI Page Builder
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

WordPress Kubio AI Page Builder是WordPress基金会的一款集成人工智能辅助的网站页面构建工具。 WordPress Kubio AI Page Builder 2.8.5及之前版本存在授权问题漏洞，该漏洞源于插件未正确验证用户是否被授权执行操作，导致经过身份验证的攻击者（具有贡献者级别及以上访问权限）可以覆盖首页配置选项、重写主导航菜单项、替换模板部分并覆盖Kubio全局数据帖。

CVSS 4.3 · Medium EPSS 0.39% · P30

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation

Affected Version Matrix 1

VendorProduct Version RangeStatus
extendthemes Kubio AI Page Builder ≤ 2.8.5 affected
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I. Basic Information for CVE-2026-16779

Vulnerability Information
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Vulnerability Title
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
Source: CVE Program / CVE List V5
Vulnerability Description
The 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
WordPress Kubio AI Page Builder 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WordPress Kubio AI Page Builder是WordPress基金会的一款集成人工智能辅助的网站页面构建工具。 WordPress Kubio AI Page Builder 2.8.5及之前版本存在授权问题漏洞，该漏洞源于插件未正确验证用户是否被授权执行操作，导致经过身份验证的攻击者（具有贡献者级别及以上访问权限）可以覆盖首页配置选项、重写主导航菜单项、替换模板部分并覆盖Kubio全局数据帖。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
extendthemes Kubio AI Page Builder 0 ~ 2.8.5 -

II. Public POCs for CVE-2026-16779

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III. Intelligence Information for CVE-2026-16779

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News Coverage for CVE-2026-16779 (1)

Vendor Pages for CVE-2026-16779 (1)

Other References for CVE-2026-16779 (1)

IV. Related Vulnerabilities

Same product: Kubio AI Page Builder
Same vendor: extendthemes
Same weakness: CWE-862

V. Comments for CVE-2026-16779

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