Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-104729— Avada (Fusion) Builder <= 3.16.2 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'tab_index' and 'empty_notice' Shortcode Attributes

Quick assessment

Affected
themefusion Avada (Fusion) Builder
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

WordPress 的 Avada（Fusion）构建器插件存在存储型跨站脚本（Stored XSS）漏洞，影响所有 3.16.2 及更早版本。该漏洞源于对 和 参数的输入清理不足以及输出转义缺失。具备贡献者（Contributor）及以上权限的已认证攻击者可借此在页面中注入任意 Web 脚本，当用户访问被注入的页面时，脚本将被执行。由于恶意字符位于短代码属性文本中（即方括号 内部），而 函数将此类内容视为纯文本而非 HTML 标记，因此在保存时未能过滤掉攻击载荷。

CVSS 6.4 · Medium EPSS 0.16% · P5

Affected Version Matrix 1

VendorProduct Version RangeStatus
themefusion Avada (Fusion) Builder ≤ 3.16.2 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-104729

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Avada (Fusion) Builder <= 3.16.2 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'tab_index' and 'empty_notice' Shortcode Attributes
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
themefusion Avada (Fusion) Builder 0 ~ 3.16.2 -

II. Public POCs for CVE-2026-104729

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-104729

请登录查看更多情报信息。

Security Blog Posts for CVE-2026-104729 (1)

Vendor Pages for CVE-2026-104729 (1)

IV. Related Vulnerabilities

Same product: Avada (Fusion) Builder
Same vendor: themefusion
Same weakness: CWE-79