Save as PDF < 3.2.0 - 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. On the “Settings > Save as PDF > Basic Settings”, enable custom HTML for “Button Image” 2. Add the following payload in the field: ![](x) 3. Observe the XSS vulnerability on all pages.