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

Wordfence Intelligence   >   Vulnerability Database   >   Click to Chat <= 4.39 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'num' Shortcode Parameter
6.4
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE CVE-2026-7795
CVSS 6.4 (Medium)
Publicly Published June 5, 2026
Last Updated June 6, 2026
Researcher Valatty

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.

Learn more about Cross-Site Scripting vulnerabilities and how to prevent them.

References

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Vulnerability Details for Click to Chat – HoliThemes

Click to Chat – HoliThemes

Software Type Plugin
Software Slug click-to-chat-for-whatsapp (view on wordpress.org)
Patched? Yes
Remediation Update to version 4.40, or a newer patched version
Affected Version
  • <= 4.39
Patched Version
  • 4.40

Recent vulnerabilities in Click to Chat – HoliThemes

Click to Chat <= 4.22 - Authenticated (Contributor+) Stored DOM-Based Cross-Site Scripting via data-no_number Parameter
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CVE-2025-5336
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Researcher: Asaf Mozes
Click to Chat – HoliThemes <= 3.35 - Authenticated (Contributor+) Local File Inclusion
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CVE-2024-3849
Apr 17, 2024
Researcher: haidv35
Click to Chat <= 3.18 - Authenticated (Contributor+) Stored Cross-Site Scripting via Shortcode
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CVE-2022-4480
Dec 21, 2022
Researcher: István Márton
# Title CVE ID CVSS Researchers Date
1 Click to Chat <= 4.22 - Authenticated (Contributor+) Stored DOM-Based Cross-Site Scripting via data-no_number Parameter CVE-2025-5336 6.4 Asaf Mozes June 13, 2025
2 Click to Chat – HoliThemes <= 3.35 - Authenticated (Contributor+) Local File Inclusion CVE-2024-3849 8.8 haidv35 April 17, 2024
3 Click to Chat <= 3.18 - Authenticated (Contributor+) Stored Cross-Site Scripting via Shortcode CVE-2022-4480 6.4 István Márton December 21, 2022
View more vulnerabilities in this software package View more vulnerabilities

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