CVE-2026-83492

Kubio AI Website Builder < 2.9.1 - Authenticated (Admin+) Denial of Service

2026-08-31 00:00

Strategic Overview

Status: Patched in 2.9.1
Affected Plugin: Kubio AI Page Builder
Affected Version: < 2.9.1
CVSS: 4.9Medium
Weakness type: CWE-20 · Improper Input Validation
CVE: CVE-2026-83492

View all Kubio AI Page Builder vulnerabilities

At a glance

CVE-2026-83492 is a medium-severity Improper Input Validation vulnerability in the Kubio AI Page Builder WordPress plugin, affecting versions < 2.9.1. It carries a CVSS score of 4.9 (reachable over the network; low attack complexity; high availability impact). Exploitation requires an authenticated account at Admin level or above. The issue is fixed in version 2.9.1; sites on affected versions should update now. Disclosed August 2026, reported by Joshua Martinelle.

Vulnerability Overview

The Kubio AI Website Builder plugin for WordPress is vulnerable to Denial of Service in all versions up to 2.9.1 (exclusive). This makes it possible for unauthenticated attackers to make the site fatal error denying access to the site.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no interaction from a victim user. A successful exploit has high impact on availability.

CWE-20: Improper Input Validation

Reaching this weakness in Kubio AI Page Builder < 2.9.1 takes an account at Admin level or above. Improper input validation means the application accepts input without confirming it has the form, type or range the code downstream assumes.

The concrete impact depends on where the unvalidated value lands, which is why records in this class range from cosmetic bugs to full compromise. For Kubio AI Page Builder the fix is 2.9.1: builds < 2.9.1 are affected, anything from 2.9.1 onward is not.

Remediation

Update to version 2.9.1, or a newer patched version

How does WordSec protect against this?

An attacker needs Admin access first, so the firewall sees the attempt as traffic from a logged-in account: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Kubio AI Page Builder 2.9.1 closes this, and updating the plugin is the step that ends it.

Firewall
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2026-83492 https://www.wordfence.com/threat-intel/vulnerabilities/id/7cfe0f4c-763a-4e02-b180-9fe333253f84 https://nvd.nist.gov/vuln/detail/CVE-2026-83492

Related records

Other vulnerabilities in Kubio AI Page Builder

CVSS Vector

4.9

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredHigh
User InteractionNone
ScopeUnchanged
ConfidentialityNone
IntegrityNone
AvailabilityHigh

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