Crelly Slider <= 1.4.5 - 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

1. Go to “Crelly Slider” 2. Add a slider 3. In the “callback” field add the payload `` 4. Click “Save Settings” 5. Navigate away and then back and “edit” the slider to see the XSS