The plugin does not sanitise and escape some of its settings, which could allow high privilege users such as admin to perform Stored Cross-Site Scripting attacks even when the unfiltered_html capability is disallowed (for example in multisite setup)
1. Navigate to “URL Shortify > Settings > Links” 2. Add ">
to the “Link Prefix” and save. 3. Go to “Links > Add New” to see the XSS.