CVE-2026-12430: Creativethemeshq Blocksy Companion

Medium severity, CVSS 4.4. EPSS: 0.3% chance of exploitation in the next 30 days.

The Blocksy Companion plugin for WordPress is vulnerable to Stored Cross-Site Scripting via admin settings in all versions up to, and including, 2.1.45 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with editor-level permissions and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This only affects multi-site installations and installations where unfiltered_html has been disabled.

Affected products

• Creativethemeshq Blocksy Companion: up to and including 2.1.45

Published 2026-06-19. Last modified 2026-06-22.