CVE Catalog

CVE-2026-18404

MediumCVSS 6.4
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.20%

10th percentile - higher than 10% of all known CVEs

Summary

The Social Chat – Click To Chat App Button plugin for WordPress up to version 8.6.2 is vulnerable to Stored Cross-Site Scripting via the 'consent_message' JSON attribute in the .qlwapp data-box. Insufficient input sanitization and output escaping allow authenticated attackers with contributor-level access or above to inject arbitrary web scripts that execute when a user accesses the page. The exploit requires no user interaction beyond page load, as setting auto_open and consent_enabled to 'yes' causes the consent box and embedded script to execute immediately.

Risk Assessment

Risk includes session hijacking of administrators, data theft, website defacement, and malware distribution to visitors.

Recommendation

Update the plugin to the latest version if available and restrict roles that can publish content. Additionally, deploy a Web Application Firewall (WAF) to filter requests.

Related vulnerabilities

Original NVD description (English source)

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.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS