Stored Cross-Site Scripting in Vayu Blocks Plugin for WordPress

CVE-2025-4420

What is CVE-2025-4420?

The Vayu Blocks plugin for WordPress is exposed to a Stored Cross-Site Scripting vulnerability through the 'containerWidth' parameter. This flaw arises from inadequate capability checks within the vayu_blocks_option_panel_callback() function, combined with insufficient input sanitization and output escaping mechanisms. As a result, authenticated users with Subscriber-level access or higher may exploit this vulnerability to insert malicious script into pages, potentially executing harmful code whenever a user visits the compromised page.

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References