---
id: CVE-2026-104729
title: >-
  Avada (Fusion) Builder <= 3.16.2 - Authenticated (Contributor+) Stored
  Cross-Site Scripting via 'tab_index' and 'empty_notice' Shortcode Attributes
summary: >-
  The Avada (Fusion) Builder plugin for WordPress is vulnerable to Stored
  Cross-Site Scripting via the 'tab_index, empty_notice' parameter in all
  versions up to, and including, 3.16.2 due to insufficient input sanitization
  and output escap…
severity: medium
cvss: 6.4
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N'
cvssSource: cna
cwe:
  - CWE-79
vendor: themefusion
product: Avada (Fusion) Builder
affected:
  - avada_fusion_builder <= 3.16.2
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-29T01:30:18.638453Z'
published: '2026-10-28'
updated: '2026-10-29'
sourceUpdated: '2026-10-29T01:41:52.852Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-104729'
references:
  - url: >-
      https://www.wordfence.com/threat-intel/vulnerabilities/id/650d346d-c30a-4ee1-ac50-6a264e181174?source=cve
  - url: 'https://avada.com/blog/version-7-16-3-security-update/'
tags:
  - cve.org
epss: 0.00156
epssPercentile: 0.04716
ingestedAt: '2026-10-28T07:06:27.116Z'
---

## Overview

The Avada (Fusion) Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'tab_index, empty_notice' parameter in all versions up to, and including, 3.16.2 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. wp_kses_post does not strip the payload on save because the dangerous characters reside within shortcode attribute text between square brackets, which kses treats as plain text rather than HTML markup.

## Affected

- `avada_fusion_builder <= 3.16.2`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.