What’s Vulnerable › Vulnerabilities

CVE-2025-4420: Vayu Blocks <= 1.3.1 - Missing Authorization to Authenticated (Subscriber+) Stored Cross-Site Scripting via containerWidth Parameter

• Severity: medium (CVSS 6.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-06-03 · updated 2026-06-17
• Weakness: CWE-79

Description

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: through 1.3.1

References

• https://plugins.trac.wordpress.org/browser/vayu-blocks/trunk/inc/admin-api.php#L6
• https://plugins.trac.wordpress.org/changeset/3303594/
• https://wordpress.org/plugins/vayu-blocks/#developers
• https://www.wordfence.com/threat-intel/vulnerabilities/id/db01bc0a-4508-4fb5-941d-3f1a52528e2b?source=cve

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