CVE-2026-18404
Received Received - Intake

Stored XSS in Social Chat WordPress Plugin

Publication date: 2026-09-05

Last updated on: 2026-09-05

Assigner: Wordfence

Description
The Social Chat – Click To Chat App Button plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'consent_message' JSON Attribute in .qlwapp data-box in all versions up to, and including, 8.6.2 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. The exploit requires no user interaction beyond page load, as setting auto_open and consent_enabled to 'yes' in the injected data-box JSON causes the consent box — and the embedded script — to execute immediately on page load.

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Meta Information

Published
2026-09-05
Last Modified
2026-09-05
Generated
2026-09-05
AI Q&A
2026-09-05
EPSS Evaluated
N/A
NVD
CVE-2026-18404
EUVD
EUVD-2026-71843

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
wpbeaverbuilder the_social_chat_click_to_chat_app_button to 8.6.2 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-79 The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

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Executive Summary

This vulnerability is a Stored Cross-Site Scripting (XSS) flaw in the Social Chat – Click To Chat App Button WordPress plugin up to version 8.6.2. It allows authenticated attackers with contributor-level access or higher to inject malicious scripts via the 'consent_message' JSON attribute in the .qlwapp data-box. The injected scripts execute when users access the compromised page without requiring further interaction.

Impact Analysis

If exploited, this vulnerability could allow attackers to steal user sessions, deface websites, or redirect visitors to malicious sites. Users with contributor-level access or above on a WordPress site using the vulnerable plugin could compromise the site and its visitors.

Compliance Impact

This vulnerability could lead to data breaches, exposing user data and violating privacy regulations like GDPR or HIPAA. Non-compliance may result in legal penalties, reputational damage, and loss of trust due to unauthorized access to sensitive information.

Mitigation Strategies

Update the Social Chat – Click To Chat App Button plugin to the latest version, which is 8.6.2 or higher. If an update is not available, consider disabling or removing the plugin until a patch is released.

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