CVE-2026-16779 json
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
published 2026-08-16 2 mo ago modified 2026-08-20 2 mo ago also EUVD-2026-59869
- cvss
- 4.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 32%
- public exploits
- 0
- none known
Summary
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.
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 2 mo ago
Exploit prediction
0.39% chance of exploitation in the next 30 days, higher than 32% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N |
Affected products
- extendthemes Kubio AI Page Builder
Classification
- Weakness
-
- CWE-862 Missing Authorization
- Technology feeds
References
- wordfence.com /threat-intel/vulnerabilities/id/febca991-90a0-46b8-9609-2c8a71b5eb5f?source=cve
- plugins.trac.wordpress.org /browser/kubio/tags/2.8.5/lib/src/Core/KubioFrontPageRevertNotice.php#L151
- plugins.trac.wordpress.org /browser/kubio/tags/2.8.5/lib/src/Core/KubioFrontPageRevertNotice.php#L25
- plugins.trac.wordpress.org /browser/kubio/tags/2.8.5/lib/editor-assets.php#L411
- plugins.trac.wordpress.org /browser/kubio/tags/2.8.5/lib/kubio-block-library.php#L197
- plugins.trac.wordpress.org /changeset?reponame=&old=3633801%40kubio&new=3633801%40kubio
Sources
- CVE List CVE-2026-16779
- NVD CVE-2026-16779
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.