CVE-2025-4420: Themehunk Vayu Blocks – Website Builder For The Block Editor

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

The Vayu Blocks – Gutenberg Blocks for WordPress & WooCommerce plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the ‘containerWidth’ parameter in all versions up to, and including, 1.3.1 due to a missing capability check on the vayu_blocks_option_panel_callback() function and insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with Subscriber-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Affected products

• Themehunk Vayu Blocks – Website Builder For The Block Editor: up to and including 1.3.1

Published 2025-06-03. Last modified 2026-06-17.