CVE-2026-88783: Kubio AI Page Builder < 2.9.3 - Unauthenticated Stored XSS via Comment Content
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, allowing them to store markup which the Kubio AI Page Builder WordPress plugin before 2.9.3's own script later executes in the browser of any visitor, or of an administrator reviewing the still-unapproved submission.
Affected Software
Event History
Frequently Asked Questions
Which installations are affected?
ExtendThemes Kubio AI Page Builder versions earlier than 2.9.3 are affected.
Does exploitation require an authenticated WordPress account?
No. The issue can be exploited through content submitted by unauthenticated users.
Who may be exposed to the stored payload?
The plugin's own script can execute the stored markup in the browser of any visitor. An administrator reviewing an unapproved submission may also trigger it.