WP Shortcodes Plugin Shortcodes Ultimate Stored Cross-Site Scripting Vulnerability

A stored cross-site scripting vulnerability has been identified in the WP Shortcodes Plugin - Shortcodes Ultimate for WordPress, affecting all versions through 7.4.2. The issue arises from inadequate input sanitization and output escaping of user-supplied attributes in the plugin's shortcodes. This vulnerability allows authenticated attackers with contributor-level access or higher to inject arbitrary web scripts into pages, which are executed when users access the affected pages.

Impact

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

Reproduction

To reproduce this vulnerability, an authenticated user with contributor-level access or higher can use the Shortcodes Ultimate plugin to create a shortcode that includes unsanitized user input. The injected script will be executed when the page is viewed.

Remediation

Users are advised to update the WP Shortcodes Plugin - Shortcodes Ultimate to version 7.4.3 or a newer patched version.