Responsive Blocks <= 2.2.1 - Missing Authorization to Authenticated (Contributor+) Arbitrary Modification via AJAX Actions

Summary

The Responsive Blocks – Page Builder for Blocks & Patterns plugin for WordPress is vulnerable to unauthorized access in all versions up to, and including, 2.2.1. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for authenticated attackers, with contributor-level access and above, to modify global site-wide plugin configuration options, including toggling custom CSS, disabling blocks, changing layout defaults such as content width, container padding, and container gap, and altering auto-block-recovery behavior.

Timeline

1. Apr 21, 2026, 6:43 AM UTCCVE published
2. Apr 21, 2026, 4:36 PM UTCCISA SSVC assessment

   Exploitation: none · Automatable: no · Technical impact: partial

3. Apr 21, 2026, 4:36 PM UTCRecord last updated

Affected versions

• cyberchimps Responsive Blocks – Page Builder for Blocks & Patterns

  From 2.0.9 · through 2.2.1

References 8