WordPress security changelog
MEDIUM CVE-2026-5427 Deferred

Kubio AI Page Builder: Dangerous file upload

Kubio AI Page Builder is affected by dangerous file upload. Exploitation requires at least contributor-level access. Successful exploitation can place attacker-controlled executable content on the server and may lead to full site compromise. The published affected range is <= 2.7.2.

CVE / CNA score 5.3 CVSS 3.1 · security@wordfence.com
NVD score Pending NVD has not published its own CVSS assessment.
Component
Kubio AI Page Builder
Plugin slug
kubio
Affected
<= 2.7.2
Safe version
> 2.7.2
Published
Apr 17, 2026
Weakness
CWE-862 — Missing Authorization

This CVE was published Apr 17, 2026 and is one of 5 known issues for this plugin.

What to do

Update, patch or deactivate.

Update Kubio AI Page Builder to a release after 2.7.2, or disable and remove it until a fixed version is available.

A safe version is available, so updating to that version or later is the preferred remediation. If an immediate update is not practical, consider a targeted application patch or temporarily restricting the affected functionality.

Deactivate only when warranted by your risk profile, or when advised by your hosting provider in the limited circumstances where the vulnerability cannot otherwise be mitigated. If you’re unsure which action is appropriate, contact Fused or your hosting provider for guidance.

Source record

Technical description

The Kubio plugin for WordPress is vulnerable to Arbitrary File Upload in versions up to and including 2.7.2. This is due to insufficient capability checks in the kubio_rest_pre_insert_import_assets() function, which is hooked to the rest_pre_insert_{post_type} filter for posts, pages, templates, and template parts. When a post is created or updated via the REST API, Kubio parses block attributes looking for URLs in the 'kubio' attribute namespace and automatically imports them via importRemoteFile() without verifying the user has the upload_files capability. This makes it possible for authenticated attackers with Contributor-level access and above to bypass WordPress's normal media upload restrictions and upload files fetched from external URLs to the media library, creating attachment posts in the database.

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

References

Primary and upstream sources