Booking Calendar and Booking Calendar Pro Reflected Cross-Site Scripting Vulnerability

A reflected cross-site scripting vulnerability has been identified in the Booking Calendar and Booking Calendar Pro plugins for WordPress. This issue affects all versions prior to and including 3.2.19 and 11.2.19, respectively. The vulnerability arises from inadequate input sanitization and output escaping, allowing unauthenticated attackers to inject arbitrary web scripts. These scripts could be executed if the attacker successfully persuades a user to perform an action, such as clicking a link, that triggers the injection.

Impact

Exploitation of this vulnerability allows for reflected cross-site scripting, where an attacker can inject malicious scripts that are executed in the context of the user's browser.

Reproduction

To reproduce this vulnerability, select a calendar from the 'wpdevart-reservations' admin page. The 'calendar_id' parameter can be manipulated to inject scripts. Once the calendar is selected, the injected script will execute if the user is tricked into clicking a link or performing an action that includes the script payload.

Remediation

Users are advised to update to Booking Calendar version 3.2.20 or Booking Calendar Pro version 11.2.20.