Link Library < 7.4.1 - Admin+ Stored XSS

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).

PoC

1. Install the plugin and go to: wp-admin/admin.php?page=link-library-general-options&currenttab;=ll-general 2. Insert the payload in the ‘Links Date Format’, such as: ‘"><’". 3. Refresh the page to get the XSS popup.