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 versions through 5.3.0. The issue arises in the 'button_caption' parameter of the '[latepoint_resources]' shortcode, where insufficient output escaping allows authenticated attackers with contributor-level access or higher to inject arbitrary scripts. These scripts are executed when a user accesses 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 '[latepoint_resources]' shortcode and include a crafted 'button_caption' parameter that contains the malicious script. The 'items' parameter must be set to 'bundles' to trigger the vulnerability. Once the shortcode is saved, the injected script will execute when the page is viewed.

Remediation

Users are advised to update the LatePoint Calendar Booking Plugin for WordPress to version 5.3.1 or later, where this vulnerability has been patched.