My Sticky Bar < 2.6.8 - Admin+ Stored XSS

Description 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

You should click on “My Sticky Bar” and create “New Bar”. Change mysticky_option_welcomebar.5Bmysticky_welcomebar_x_color%5D field to %23000000"onmouseover=alert(1)// -> Save Settings