CVE-2026-75019: Cozy Blocks <= 2.2.16 - Authenticated (Contributor+) Stored Cross-Site Scripting via cozyHoverEffect Block Attribute
The Cozy Blocks – Page Builder for Gutenberg Editor & FSE with 700+ Patterns, 58 Blocks & Templates plugin for WordPress is vulnerable to Stored Cross-Site Scripting via cozyHoverEffect Block Attribute in all versions up to, and including, 2.2.16 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. The payload survives wpksespost on save because it contains no angle brackets — only a double-quote breakout of the cozyHoverEffect.boxShadow.color attribute value — allowing event-handler injection at the render stage.
Affected Software
Event History
Frequently Asked Questions
Who can exploit this issue?
An attacker needs an authenticated WordPress account with Contributor-level access or higher. They must be able to create or modify content containing the affected Cozy Blocks block attribute.
What must happen for the injected script to run?
The attacker’s payload is stored in a page and executes when a user accesses that injected page. No user interaction beyond visiting the affected page is described.
Why can the payload persist despite WordPress content filtering?
The payload survives wp_kses_post during saving because it does not use angle brackets. It relies on a double-quote breakout in the cozyHoverEffect.boxShadow.color attribute value to inject an event handler when the block is rendered.
Which plugin versions are affected?
All Cozy Blocks versions up to and including 2.2.16 are affected.