Live Photos on WordPress Stored Cross-Site Scripting Vulnerability

A stored cross-site scripting vulnerability has been identified in the Live Photos on WordPress plugin, affecting all versions through 0.1. The issue arises in the livephotos_photo shortcode, where the 'video_src', 'img_src', and 'class' parameters are not properly sanitized or escaped. This flaw allows authenticated attackers with contributor-level access or higher to inject arbitrary scripts into pages, which are executed when a user views 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.