CVE-2026-19726 in Visualizer Plugin
Summary
by MITRE • 08/16/2026
The Visualizer WordPress plugin before 4.0.7 does not properly authorise access to the configuration of its charts, allowing users with the Contributor role and above to read the full configuration of any chart on the site, including charts the Visualizer WordPress plugin before 4.0.7's own interface denies them, and to retrieve every chart's configuration in a single request. The disclosed configuration can include the credentials of a remote data source a chart reads from.
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Analysis
by VulDB Data Team • 08/16/2026
The Visualizer WordPress plugin vulnerability represents a critical authorization flaw that undermines the security model of the plugin's chart management system. This issue affects versions prior to 4.0.7 and specifically targets the plugin's configuration access controls, creating a significant privilege escalation risk for users with the Contributor role and above. The vulnerability stems from inadequate input validation and insufficient access control mechanisms within the plugin's backend architecture, allowing unauthorized users to bypass normal security boundaries that should restrict chart configuration access based on user roles and permissions.
The technical implementation of this flaw involves a lack of proper role-based access control checks when processing requests for chart configurations. Attackers with Contributor-level privileges can exploit this weakness to retrieve complete chart configuration data through a single API request, effectively circumventing the plugin's built-in security controls that are designed to prevent such unauthorized access. This vulnerability operates at the application layer and leverages the plugin's internal API endpoints without proper authentication or authorization verification, making it particularly dangerous as it can be exploited through automated tools and scripts.
The operational impact of this vulnerability extends beyond simple information disclosure, as the compromised chart configurations may contain sensitive credentials for remote data sources that charts depend upon. This creates a potential attack vector where malicious actors can extract database connection strings, API keys, or other authentication tokens required for external data services. The implications are severe because it allows attackers to gain access to underlying data sources and potentially escalate their privileges within the broader system infrastructure. The ability to retrieve multiple chart configurations in a single request amplifies the damage potential, enabling comprehensive reconnaissance of the entire charting environment.
Security professionals should consider this vulnerability in the context of CWE-285, which addresses improper authorization issues in software systems, and aligns with ATT&CK technique T1078 for valid accounts and credential access. The flaw demonstrates poor secure coding practices related to access control implementation and highlights the importance of defense-in-depth strategies for WordPress plugins. Organizations using Visualizer plugin versions prior to 4.0.7 should immediately implement mitigations including updating to the patched version, implementing network-level restrictions on API endpoints, and conducting thorough security audits of chart configurations containing sensitive data. Additionally, administrators should consider implementing role-based access control measures that limit the scope of privileges granted to users with Contributor roles or lower, ensuring that configuration data remains protected from unauthorized access attempts.