Login screen manager <= 3.5.2 - Admin+ Stored XSS

Description The plugin does not sanitize 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

Put the following payload in the “Hover Title” settings of the plugin: The XSS will be triggered on the login page