WP Booking Calendar Stored Cross-Site Scripting Vulnerability

A stored cross-site scripting vulnerability has been identified in the WP Booking Calendar plugin for WordPress, affecting all versions through 10.9.2. The issue arises from inadequate input sanitization and output escaping of user-supplied attributes in the 'booking' shortcode. This vulnerability allows authenticated attackers with contributor-level access or higher to inject arbitrary scripts into pages, which are executed when users access the affected page.

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 'booking' shortcode to create a booking entry. The user can inject scripts into the entry, which will be executed when the page is viewed by other users.

Remediation

Users are advised to update the WP Booking Calendar plugin to version 10.9.3 or later.