LatePoint Calendar Booking Plugin for WordPress Stored Cross-Site Scripting Vulnerability

A stored cross-site scripting vulnerability has been identified in the LatePoint Calendar Booking Plugin for WordPress, affecting all versions through 5.5.0. The issue arises from inadequate input sanitization and output escaping, allowing unauthenticated attackers to inject arbitrary web scripts via the 'booking_form_page_url' parameter. These scripts are executed when a user accesses the affected page. Notably, the vulnerability can be exploited without a configured Stripe integration, as the relevant action hook is triggered before validating the Stripe account ID, leaving room for exploitation.

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.

Reproduction

To reproduce this vulnerability, an unauthenticated user can inject a script into the 'booking_form_page_url' parameter. This can be done by accessing a page that uses this parameter without proper sanitization. Once the script is injected, it will be executed when the page is accessed by any user.

Remediation

Users are advised to update the LatePoint Calendar Booking Plugin for WordPress to version 5.5.1 or later, where this vulnerability has been patched.