CVE-2026-100107: Kubio AI Page Builder <= 2.9.2 - Unauthenticated Stored Cross-Site Scripting via SVG Comment Content (KSES Allowlist Bypass)

Severity: high (CVSS 7.2 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-10-02 · updated 2026-10-03
Weakness: CWE-79

Description

The Kubio AI Page Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'comment' parameter in all versions up to, and including, 2.9.2 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Affected products

extendthemes Kubio AI Page Builder: through 2.9.2

References

https://plugins.trac.wordpress.org/browser/kubio/tags/2.9.1/build/frontend/index.js
https://plugins.trac.wordpress.org/browser/kubio/tags/2.9.1/lib/admin-pages/pages.php#L195
https://plugins.trac.wordpress.org/browser/kubio/tags/2.9.1/lib/filters/svg-kses.php#L74
https://plugins.trac.wordpress.org/browser/kubio/tags/2.9.1/lib/filters/svg-kses.php#L80
https://plugins.trac.wordpress.org/browser/kubio/tags/2.9.1/lib/frontend.php#L11
https://plugins.trac.wordpress.org/changeset?reponame=&old=3720531%40kubio&new=3720531%40kubio
https://www.wordfence.com/threat-intel/vulnerabilities/id/91e44955-d01c-4e81-89bf-35f27b8cda43?source=cve

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