CVE-2026-18435: Stellarwp Kadence Blocks — Page Builder Toolkit For Gutenberg Editor

Medium severity, CVSS 6.4. EPSS: 0.3% chance of exploitation in the next 30 days.

The Kadence Blocks — Page Builder Toolkit for Gutenberg Editor plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'toggleIcon' Block Attribute in all versions up to, and including, 3.7.8 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.

Affected products

• Stellarwp Kadence Blocks — Page Builder Toolkit For Gutenberg Editor: up to and including 3.7.8

Published 2026-08-01. Last modified 2026-08-12.