The Responsive Blocks – Page Builder for Blocks & Patterns plugin for WordPress is vulnerable to Unauthenticated Open Email Relay in all versions up to, and including, 2.2.0. This is due to insufficient authorization checks and missing server-side validation of the recipient email address supplied via a public REST API route. This makes it possible for unauthenticated attackers to send arbitrary emails to any recipient of their choosing through the affected WordPress site's mail server, effectively turning the site into an open mail relay.
CVE-2026-6675 is a medium severity with CVSS 5.3 Vulnerability issue affecting the Plugin Responsive Blocks – Page Builder for Blocks & Patterns. It affects Versions up to 2.2.0 and is fixed in 2.2.1.
CVE-2026-6675 is tracked for the Plugin Responsive Blocks – Page Builder for Blocks & Patterns as medium severity with CVSS 5.3. The affected range is Versions up to 2.2.0. Update Responsive Blocks – Page Builder for Blocks & Patterns to 2.2.1 or newer where that version is compatible with the site.
| Software Type | Plugin |
|---|---|
| Software Slug |
responsive-block-editor-addons
View on wordpress.org
|
| CVE | CVE-2026-6675 |
| Patched Versions |
2.2.1
|
| Affected Versions |
Versions up to 2.2.0
|
These internal links group the same WordPress plugin by CVE, issue type, severity, and patch status so operators and search engines can connect the full vulnerability cluster.
Responsive Blocks <= 2.0.6 - Authenticated (Contributor+) Stored Cross-Site Scripting
Responsive Blocks <= 2.0.5 - Authenticated (Contributor+) Stored Cross-Site Scripting
Responsive Blocks <= 2.0.2 - Authenticated (Contributor+) Stored Cross-Site Scripting
Responsive Blocks <= 1.9.9 - Authenticated (Contributor+) Stored Cross-Site Scripting
Responsive Blocks – WordPress Gutenberg Blocks <= 1.9.9 - Authenticated (Contributor+) Stored Cross-Site Scripting via section_tag Parameter
Responsive Blocks – WordPress Gutenberg Blocks <= 1.9.7 - Authenticated (Contributor+) Stored Cross-Site Scripting
Responsive Blocks – WordPress Gutenberg Blocks <= 1.8.8 - Authenticated (Contributor+) Stored Cross-Site Scripting
Responsive Blocks – Page Builder for Blocks & Patterns <= 2.2.0 - Missing Authorization
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