Auth bypass in Extendthemes Kubio Ai Page Builder
CVE-2026-5427
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_p…
Vulnerability class: Broken Access Control
EPSS: 0.000 (4.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.
Affected products
- Extendthemes Kubio Ai Page Builder — versions 0
Weakness classification (CWE)
References
- www.wordfence.com/threat-intel/vulnerabilities/id/d8096f3c-e1a9-424f-af10-3e802…
- plugins.trac.wordpress.org/browser/kubio/trunk/lib/src/Core/Importer.php
- plugins.trac.wordpress.org/browser/kubio/tags/2.7.1/lib/src/Core/Importer.php
- plugins.trac.wordpress.org/browser/kubio/trunk/lib/importer/importer-filters/ku…
- plugins.trac.wordpress.org/browser/kubio/tags/2.7.1/lib/importer/importer-filte…
- plugins.trac.wordpress.org/browser/kubio/trunk/lib/filters/post-insert.php
- plugins.trac.wordpress.org/browser/kubio/tags/2.7.1/lib/filters/post-insert.php
- plugins.trac.wordpress.org/changeset/3506647/kubio/trunk/lib/src/Core/Importer…
Frequently asked questions
- What is CVE-2026-5427?
- CVE-2026-5427 is a medium-severity vulnerability in Extendthemes Kubio Ai Page Builder, classified under Missing Authorization. CVSS score: 5.3/10. Published 2026-04-17.
- How severe is CVE-2026-5427?
- Medium severity. CVSS v3 base score is 5.3 out of 10.