Ultimate Carousel For WPBakery Page Builder Stored Cross-Site Scripting Vulnerability

A stored cross-site scripting vulnerability has been identified in the Ultimate Carousel for WPBakery Page Builder WordPress plugin, affecting versions through 2.6. The issue arises because the plugin fails to properly validate and escape certain shortcode attributes before rendering them on pages or posts. This flaw enables users with a contributor role or higher to execute stored cross-site scripting attacks.

Impact

Exploitation of this vulnerability allows for stored cross-site scripting, where injected scripts are executed in the context of the user viewing the affected page or post.

Reproduction

To reproduce this vulnerability, use a shortcode with the 'slide_visible_mbl' attribute, including a payload such as a JavaScript event handler (e.g., 'onmouseover') and a style attribute (e.g., 'background:red;'). When the shortcode is processed, the injected script will execute, demonstrating the cross-site scripting vulnerability.