PT-2026-33914 · WordPress · Responsive Blocks

Even Stokkedalen · Published 2026-04-21 · Updated 2026-04-21 · CVE-2026-6675

Positive Technologies (AI Summary)

CVSS v3.1

5.3

Medium

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Name of the Vulnerable Software and Affected Versions Responsive Blocks – Page Builder for Blocks & Patterns versions prior to 2.2.1

Description Insufficient authorization checks and missing server-side validation of the recipient email address supplied via a public REST API route allow unauthenticated attackers to send arbitrary emails to any recipient. This effectively turns the affected WordPress site's mail server into an open mail relay.

Recommendations Update to a version later than 2.2.0.

Fix

RCE

Weakness Enumeration

CWE-20

Related Identifiers

CVE-2026-6675

Affected Products

Responsive Blocks

References · 9

• https://nvd.nist.gov/vuln/detail/CVE-2026-6675 · Security Note
• https://plugins.trac.wordpress.org/browser/responsive-block-editor-addons/tags/2.1.9/includes/class-responsive-block-editor-addons.php#L2212 · Note
• https://plugins.trac.wordpress.org/browser/responsive-block-editor-addons/tags/2.1.9/includes/class-responsive-block-editor-addons.php#L2324 · Note
• https://plugins.trac.wordpress.org/browser/responsive-block-editor-addons/trunk/includes/class-responsive-block-editor-addons.php#L2324 · Note
• https://plugins.trac.wordpress.org/browser/responsive-block-editor-addons/trunk/includes/class-responsive-block-editor-addons.php#L2212 · Note
• https://twitter.com/CVEnew/status/2046571854723526707 · Twitter Post
• https://wordfence.com/threat-intel/vulnerabilities/id/17452a29-bcef-451a-9893-a436ac5d3b80?source=cve · Note
• https://plugins.trac.wordpress.org/browser/responsive-block-editor-addons/trunk/includes/class-responsive-block-editor-addons.php#L2403 · Note
• https://plugins.trac.wordpress.org/browser/responsive-block-editor-addons/tags/2.1.9/includes/class-responsive-block-editor-addons.php#L2403 · Note