CVE-2026-18404

Summary

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.

Affected Software

Weaknesses

• CWE-79: CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

References

• https://www.wordfence.com/threat-intel/vulnerabilities/id/f159392b-5bc6-4c12-a924-13ea170bb7fa?source=cve
• https://plugins.trac.wordpress.org/browser/wp-whatsapp-chat/tags/8.6.1/build/frontend/js/index.js#L2
• https://plugins.trac.wordpress.org/browser/wp-whatsapp-chat/tags/8.6.1/lib/controllers/class-frontend.php#L86
• https://plugins.trac.wordpress.org/browser/wp-whatsapp-chat/tags/8.5.1/build/frontend/js/index.js#L2
• https://plugins.trac.wordpress.org/browser/wp-whatsapp-chat/tags/8.5.1/lib/controllers/class-frontend.php#L86
• https://plugins.trac.wordpress.org/changeset?reponame=&new=3667778%40wp-whatsapp-chat%2Ftags%2F8.6.3&old=3664149%40wp-whatsapp-chat%2Ftags%2F8.6.2
• https://plugins.trac.wordpress.org/changeset?old_path=%2Fwp-whatsapp-chat/tags/8.6.2&new_path=%2Fwp-whatsapp-chat/tags/8.6.3

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