Vulnerability 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.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://plugins.trac.wordpress.org/browser/wp-whatsapp-chat/tags/8.5.1/build/fro
- https://plugins.trac.wordpress.org/browser/wp-whatsapp-chat/tags/8.5.1/lib/contr
- https://plugins.trac.wordpress.org/browser/wp-whatsapp-chat/tags/8.6.1/build/fro
- https://plugins.trac.wordpress.org/browser/wp-whatsapp-chat/tags/8.6.1/lib/contr
- https://plugins.trac.wordpress.org/changeset?old_path=%2Fwp-whatsapp-chat/tags/8
- https://plugins.trac.wordpress.org/changeset?reponame=&new=3667778%40wp-whatsapp
- https://www.wordfence.com/threat-intel/vulnerabilities/id/f159392b-5bc6-4c12-a92
FAQ
What is CVE-2026-18404?
CVE-2026-18404 is a vulnerability with a CVSS score of 6.4 (MEDIUM). 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 includi...
How severe is CVE-2026-18404?
CVE-2026-18404 has been rated MEDIUM with a CVSS base score of 6.4/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-18404?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.