CVE-2026-16779
MediumCVSS 4.3Exploitation Probability (EPSS)
Low risk13th percentile - higher than 13% of all known CVEs
Summary
The Kubio AI Page Builder plugin for WordPress up to version 2.8.5 is vulnerable to authorization bypass. Improper permission verification allows authenticated attackers with contributor-level access to overwrite front-page configuration, rewrite navigation menus, replace template parts, and overwrite global data. The nonce is available to all block editor users, making it ineffective.
Risk Assessment
The organization may face unauthorized changes to the WordPress site's appearance and configuration. Attackers with low privileges can take control of key site elements.
Recommendation
Update the Kubio AI Page Builder plugin to the latest version. Limit contributor accounts and regularly audit permissions.
Other vulnerabilities in Kubio AI Page Builder
See all- CVE-2026-94167High
The Kubio AI Page Builder plugin for WordPress (up to version 2.9.3) is vulnerable to Reflected XSS due to improper input neutralization during web page generation. An attacker can inject a malicious script that is reflected and executed in the user's browser.
- CVE-2026-88783High
The Kubio AI Page Builder WordPress plugin before 2.9.3 does not limit its widening of the allowed HTML elements to the editor context, so the wider set is applied when filtering content submitted by unauthenticated users as well. This allows storing markup which the plugin's own script later executes in the browser of any visitor or an administrator reviewing the still-unapproved submission.
- CVE-2026-88782Medium
The Kubio AI Page Builder WordPress plugin before 2.9.3 does not validate the URI scheme of a user-supplied value before outputting it as a link target. Users with the contributor role and above can store a payload that executes in the browser of anyone who follows the link, including an administrator previewing the unpublished submission.
- CVE-2026-100107High
The Kubio AI Page Builder plugin for WordPress is vulnerable to stored XSS via the 'comment' parameter. Insufficient input sanitization and output escaping allow unauthenticated attackers to inject scripts that execute when a user accesses an injected page.
- CVE-2026-14472Medium
The Kubio AI Page Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via kubio/copyright Block Content in all versions up to and including 2.8.4 due to insufficient input sanitization and output escaping. Authenticated attackers with contributor-level access or above can inject arbitrary web scripts that execute when a user accesses an injected page. This bypasses both WordPress core kses-on-save and the plugin's own wp_kses_post() because entity-encoded script tags are treated as inert text but decoded into live HTML.
Original NVD description (English source)
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.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS