Ninja Forms < 3.6.26 - Admin+ Stored HTML Injection

Description The plugin does not sanitize and escape its label fields, which could allow high privilege users such as admin to perform Stored HTML injection. Only users with the unfiltered_html capability can perform this, and such users are already allowed to use JS in posts/comments etc however the vendor acknowledged and fixed the issue

PoC

Put the following code in any form field (for example name, email, message etc) labels:

Sam

or