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CVE-2026-7795— Click to Chat <= 4.39 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'num' Shortcode Parameter

Quick assessment

Affected
holithemes Click to Chat – HoliThemes
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 Click to Chat – WA Widget 4.38及之前版本存在跨站脚本漏洞，该漏洞源于CCW_Shortcode::shortcode()函数对num参数应用esc_attr()后，其值被直接插入Java

CVSS 6.4 · Medium EPSS 0.49% · P40

Affected Version Matrix 1

VendorProduct Version RangeStatus
holithemes Click to Chat – HoliThemes ≤ 4.39 affected
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I. Basic Information for CVE-2026-7795

Vulnerability Information
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Vulnerability Title
Click to Chat <= 4.39 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'num' Shortcode Parameter
Source: CVE Program / CVE List V5
Vulnerability Description
The Click to Chat – WA Widget plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the [chat] shortcode 'num' parameter in all versions up to, and including, 4.38. This is due to insufficient escaping when embedding user-supplied shortcode attribute values inside JavaScript string literals that are then placed in HTML event-handler attributes. The CCW_Shortcode::shortcode() function applies esc_attr() to the 'num' parameter (line 157), which converts single quotes to the HTML entity &#039;. This entity-encoded value is then interpolated directly into a JavaScript window.open() call string delimited by single quotes (line 194/221), and that complete string is placed verbatim into an HTML onclick attribute in the style template files (e.g., sc-style-1.php line 6). Because browsers HTML-decode event attribute values before executing the embedded JavaScript, the &#039; entities are decoded back to literal single quotes at runtime, allowing the injected payload to break out of the JavaScript string context and execute arbitrary code. This makes it possible for authenticated attackers with Contributor-level access and above to inject arbitrary web scripts into pages that will execute whenever a user clicks the WhatsApp chat button rendered by the [chat] 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 Click to Chat – WA Widget 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 Click to Chat – WA Widget 4.38及之前版本存在跨站脚本漏洞，该漏洞源于CCW_Shortcode::shortcode()函数对num参数应用esc_attr()后，其值被直接插入Java
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
holithemes Click to Chat – HoliThemes 0 ~ 4.39 -

II. Public POCs for CVE-2026-7795

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III. Intelligence Information for CVE-2026-7795

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Patches & Fixes for CVE-2026-7795 (4)

Vendor Advisories for CVE-2026-7795 (1)

Other References for CVE-2026-7795 (3)

IV. Related Vulnerabilities

Same product: Click to Chat – HoliThemes
Same vendor: holithemes
Same weakness: CWE-79

V. Comments for CVE-2026-7795

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