CVE-2026-2608 in Page Builder Toolkit for Gutenberg Editor Plugin
Summary
by MITRE • 02/17/2026
The Kadence Blocks — Page Builder Toolkit for Gutenberg Editor plugin for WordPress is vulnerable to unauthorized access due to a missing capability check on a function in all versions up to, and including, 3.5.32. This makes it possible for authenticated attackers, with Contributor-level access and above, to perform an unauthorized action.
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Analysis
by VulDB Data Team • 02/20/2026
The vulnerability identified as CVE-2026-2608 affects the Kadence Blocks plugin for WordPress, specifically within the Page Builder Toolkit component that integrates with the Gutenberg editor. This security flaw represents a critical authorization bypass issue that undermines the plugin's access control mechanisms. The vulnerability exists in all versions up to and including 3.5.32, making it a widespread concern for WordPress installations that utilize this popular page building toolkit. The issue stems from a fundamental missing capability check within a specific function, which allows authenticated users to execute actions they should not be permitted to perform based on their role permissions.
The technical implementation of this vulnerability lies in the absence of proper capability verification within the plugin's codebase. When authenticated users with Contributor-level access or higher attempt to interact with certain functions within the Kadence Blocks toolkit, the system fails to validate whether these users possess the appropriate permissions to perform the requested operations. This missing capability check creates an exploitable condition where users can bypass normal WordPress access controls and execute unauthorized actions. The vulnerability specifically targets the plugin's administrative functions that should be restricted to users with higher privileges such as administrators or editors, yet remain accessible to lower-level contributors due to the flawed authorization logic.
From an operational perspective, this vulnerability presents significant risks to WordPress sites utilizing the affected plugin. Contributors, who typically have limited capabilities to modify content and settings, can potentially access advanced features that should be restricted to administrators or editors. This unauthorized access could enable attackers to manipulate page layouts, modify plugin configurations, or potentially gain access to sensitive site data. The impact extends beyond simple privilege escalation as it could provide attackers with footholds for further exploitation, potentially leading to complete site compromise. The vulnerability's presence in all versions up to 3.5.32 means that a substantial number of WordPress installations could be at risk, particularly those that have not updated to newer versions of the plugin.
The vulnerability aligns with CWE-284, which addresses improper access control issues in software systems. This classification specifically covers situations where applications fail to properly enforce access restrictions, allowing unauthorized users to perform actions they should not be permitted to execute. From an ATT&CK framework perspective, this vulnerability maps to privilege escalation techniques where attackers leverage missing access controls to elevate their permissions within a system. The affected plugin's failure to implement proper capability checks creates a vector for attackers to move laterally within the WordPress environment, potentially enabling more sophisticated attacks such as data exfiltration or malicious code injection. Organizations should immediately implement mitigations including plugin updates to versions that address the capability check issue, and consider implementing additional monitoring for unauthorized access attempts within their WordPress installations.
The security implications of this vulnerability extend beyond immediate exploitation potential to encompass broader concerns about WordPress plugin security practices. This flaw demonstrates the importance of implementing comprehensive access control mechanisms within WordPress plugins, particularly those that provide advanced content management capabilities. The vulnerability serves as a reminder that even seemingly minor security oversights can create significant risks, especially when they affect core access control functions. Organizations should conduct thorough security assessments of their WordPress plugin ecosystem to identify similar capability check deficiencies that could create similar unauthorized access scenarios. Regular security audits and prompt patch management practices become essential components of maintaining WordPress site security, particularly when dealing with plugins that provide extensive administrative functionality.