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CVE-2026-4336— Ultimate FAQ Accordion Plugin <= 2.4.7 - Authenticated (Author+) Stored Cross-Site Scripting via FAQ Content

Quick assessment

Affected
rustaurius Ultimate FAQ Accordion Plugin
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和WordPress plugin都是WordPress基金会的产品。WordPress是一套使用PHP语言开发的博客平台。该平台具有在基于PHP和MySQL的服务器上架设个人博客网站的功能。WordPress plugin是一个应用插件。 WordPress plugin Ultimate FAQ Accordion 2.4.7及之前版本存在跨站脚本漏洞，该漏洞源于渲染时对FAQ内容调用html_entity_decode且输出转义不足，可能导致存储型跨站脚本攻击。

CVSS 6.4 · Medium EPSS 0.38% · P30
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I. Basic Information for CVE-2026-4336

Vulnerability Information
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Vulnerability Title
Ultimate FAQ Accordion Plugin <= 2.4.7 - Authenticated (Author+) Stored Cross-Site Scripting via FAQ Content
Source: CVE Program / CVE List V5
Vulnerability Description
The Ultimate FAQ Accordion plugin for WordPress is vulnerable to Stored Cross-Site Scripting via FAQ content in all versions up to, and including, 2.4.7. This is due to the plugin calling html_entity_decode() on post_content during rendering in the set_display_variables() function (View.FAQ.class.php, line 746), which converts HTML entity-encoded payloads back into executable HTML, combined with insufficient output escaping in the faq-answer.php template where the decoded content is echoed without wp_kses_post() or any other sanitization. The ufaq custom post type is registered with 'show_in_rest' => true and defaults to 'post' capability_type, allowing Author-level users to create and publish FAQs via the REST API. An Author can submit entity-encoded malicious HTML (e.g., &lt;img src=x onerror=alert()&gt;) which bypasses WordPress's kses sanitization at save time (since kses sees entities as plain text, not tags), but is then decoded back into executable HTML by html_entity_decode() at render time. This makes it possible for authenticated attackers, with Author-level access and above, to inject arbitrary web scripts in FAQ pages that will execute whenever a user accesses an injected FAQ, either directly or via the [ultimate-faqs] shortcode.
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
Vulnerability Title
WordPress plugin Ultimate FAQ Accordion 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WordPress和WordPress plugin都是WordPress基金会的产品。WordPress是一套使用PHP语言开发的博客平台。该平台具有在基于PHP和MySQL的服务器上架设个人博客网站的功能。WordPress plugin是一个应用插件。 WordPress plugin Ultimate FAQ Accordion 2.4.7及之前版本存在跨站脚本漏洞，该漏洞源于渲染时对FAQ内容调用html_entity_decode且输出转义不足，可能导致存储型跨站脚本攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
rustaurius Ultimate FAQ Accordion Plugin 0 ~ 2.4.7 -

II. Public POCs for CVE-2026-4336

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III. Intelligence Information for CVE-2026-4336

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IV. Related Vulnerabilities

Same vendor: rustaurius
Same weakness: CWE-79

V. Comments for CVE-2026-4336

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