Executive brief
The Visualizer plugin for WordPress, which is used to create and manage interactive tables and charts, contains a security flaw that allows users with contributor-level access or higher to inject malicious scripts into the website. These scripts will automatically run in the browser of any visitor who views the affected page. This could lead to unauthorized actions being performed on behalf of site administrators or the theft of sensitive session information.
Technical details
The Visualizer plugin for WordPress is vulnerable to Stored Cross-Site Scripting (XSS) due to insufficient input sanitization and output escaping on the 'backend-title' parameter. This vulnerability exists in all versions up to and including 4.0.5. An authenticated attacker with at least contributor-level permissions can inject arbitrary web scripts into the database. These scripts are then executed in the security context of any user's browser who accesses the page where the malicious title is rendered. This is a stored XSS vulnerability (CWE-79) that can lead to session hijacking or unauthorized administrative actions.
Affected products
- ThemeIsle Visualizer – Tables & Charts Manager with Built-in AI Generator <= 4.0.5
Timeline
- 2026-07-24: disclosed
- 2026-07-24: advisory
References
- https://plugins.trac.wordpress.org/browser/visualizer/tags/4.0.5/classes/Visualizer/Module/Chart.php
- https://plugins.trac.wordpress.org/browser/visualizer/tags/4.0.5/classes/Visualizer/Module/Chart.php
- https://plugins.trac.wordpress.org/browser/visualizer/tags/4.0.5/classes/Visualizer/Render/Page/Data.php
- https://plugins.trac.wordpress.org/changeset?reponame=&old=3619025%40visualizer&new=3619025%40visualizer
- https://www.wordfence.com/threat-intel/vulnerabilities/id/914554fd-1525-4925-bce4-2df4a8df5dbf?source=cve