What the vulnerability does
01Description
The Cozy Blocks – Page Builder for Gutenberg Editor & FSE with 600+ Patterns, 58 Blocks & Templates plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'postMeta.font.size' Block Attribute in all versions up to, and including, 2.2.11 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.
Explanation of Vulnerability in Simple Terms
02Summary
Cozy Blocks allows authenticated users to inject malicious scripts that execute in other users' browsers. The vulnerability exists in versions up to 2.2.11 and affects the page builder's handling of user input. An attacker with low-level access can craft malicious content that impacts site visitors across the platform. Update to a version newer than 2.2.11 to remediate.
What an attacker can do
03Attacker Capabilities
Inject JavaScript that runs in other users' browsers, potentially stealing session tokens or modifying page content.
Potential impact on your site
04Site Impact
Compromised user accounts, defaced content, or stolen admin credentials if an administrator views malicious content.
Conditions required to exploit
05Prerequisites
Attacker must have a low-privilege account (e.g., contributor or editor role) on the WordPress site.
Key dates
06Disclosure timeline
July 28, 2026
CVE published
July 28, 2026
Record updated
