CVE-2026-32543 in Responsive Blocks Plugin
Summary
by MITRE • 03/13/2026
Missing Authorization vulnerability in CyberChimps Responsive Blocks responsive-block-editor-addons allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects Responsive Blocks: from n/a through <= 2.2.0.
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Analysis
by VulDB Data Team • 03/15/2026
The vulnerability identified as CVE-2026-32543 represents a critical missing authorization flaw within the CyberChimps Responsive Blocks plugin, specifically impacting the responsive-block-editor-addons component. This security weakness manifests as an incorrectly configured access control security level that enables unauthorized exploitation. The vulnerability exists within the plugin's responsive blocks functionality and affects versions ranging from the initial release through version 2.2.0, indicating a prolonged period during which this authorization gap remained unaddressed. The issue fundamentally undermines the plugin's ability to properly enforce access controls, creating potential entry points for malicious actors seeking to manipulate or exploit the affected system.
The technical implementation of this vulnerability stems from inadequate authorization checks within the plugin's codebase, where proper access control mechanisms fail to validate user permissions before allowing execution of privileged operations. This misconfiguration allows users with insufficient privileges to perform actions that should be restricted to authorized administrators or specific user roles. The flaw operates at the application level, specifically within the block editor functionality where users can modify content or settings. According to CWE classification, this vulnerability maps to CWE-285, which addresses improper authorization within software systems. The issue represents a direct violation of the principle of least privilege, where access controls are not properly enforced to restrict user actions based on their assigned permissions.
The operational impact of this vulnerability extends beyond simple unauthorized access, potentially enabling attackers to manipulate content, modify plugin configurations, or gain elevated privileges within the affected WordPress environment. An attacker exploiting this vulnerability could leverage the missing authorization checks to perform administrative actions without proper authentication, potentially leading to complete system compromise. The vulnerability affects the WordPress block editor ecosystem, where responsive blocks are utilized for creating dynamic content layouts. This presents a significant risk to websites using the affected plugin, as the attack surface includes not only the plugin's functionality but also the broader WordPress administrative interface. The exploitability of this vulnerability aligns with ATT&CK technique T1078 which covers valid accounts usage, as unauthorized access could be achieved through improper access control enforcement rather than brute force or credential theft.
Mitigation strategies for CVE-2026-32543 require immediate action to address the authorization gap within the plugin. System administrators should prioritize updating the Responsive Blocks plugin to version 2.2.1 or later, where the missing authorization checks have been implemented. Additionally, organizations should conduct comprehensive access control reviews to ensure proper user role assignments and implement network segmentation to limit potential attack vectors. Security monitoring should be enhanced to detect unauthorized access attempts or modifications to plugin configurations. The remediation process should include verification that all user roles have appropriate permissions and that access control mechanisms are properly enforced throughout the plugin's functionality. Regular security audits of WordPress plugins and themes should be conducted to identify similar authorization gaps that could potentially compromise system integrity. Implementation of web application firewalls and security headers can provide additional protective layers against exploitation attempts targeting this vulnerability.