Ultimate Dashboard < 3.7.6 - 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. Go to “Ultimate Dashboard -> Settings -> General”. 2. In the “Custom Howdy Text” field, input the XSS payload: "> 3. Save the settings. 4. Observe the XSS payload being executed in the browser when the page is loaded.