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CVE-2026-8844— Responsive Check <= 0.0.3 - Authenticated (Contributor+) Stored Cross-Site Scripting via Shortcode Attributes

Quick assessment

Affected
kevin1804 Responsive Check
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 Responsive Check 0.0.3及之前版本存在跨站脚本漏洞，该漏洞源于对rspcheck短代码中url和button属性输入清理和输出转义不足，可能导致认证攻击者注入任意Web脚本。

CVSS 6.4 · Medium EPSS 0.20% · P10

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 1

VendorProduct Version RangeStatus
kevin1804 Responsive Check ≤ 0.0.3 affected
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I. Basic Information for CVE-2026-8844

Vulnerability Information
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Vulnerability Title
Responsive Check <= 0.0.3 - Authenticated (Contributor+) Stored Cross-Site Scripting via Shortcode Attributes
Source: CVE Program / CVE List V5
Vulnerability Description
The Responsive Check plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'rspcheck' shortcode in versions up to, and including, 0.0.3. This is due to insufficient input sanitization and output escaping on the 'url' (and 'button') shortcode attributes in the rspc_check_shortcode() function, which are echoed directly into iframe src attributes without esc_attr() or esc_url(). 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.
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 Responsive Check 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 Responsive Check 0.0.3及之前版本存在跨站脚本漏洞，该漏洞源于对rspcheck短代码中url和button属性输入清理和输出转义不足，可能导致认证攻击者注入任意Web脚本。
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
kevin1804 Responsive Check 0 ~ 0.0.3 -

II. Public POCs for CVE-2026-8844

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III. Intelligence Information for CVE-2026-8844

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Patches & Fixes for CVE-2026-8844 (1)

News Coverage for CVE-2026-8844 (1)

IV. Related Vulnerabilities

Same weakness: CWE-79

V. Comments for CVE-2026-8844

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