PageLayer < 1.8.0 - Author+ Stored XSS

Description The plugin doesn’t prevent attackers with administrator privileges from inserting malicious JavaScript inside a post’s header or footer code, even when unfiltered_html is disallowed, such as in multi-site WordPress configurations.

PoC

- As a user with Author+ capabilities, create a new post draft - Save it, then edit it using the PageLayer page builder - Navigate to the “Advanced” tab, and then the " Header, Body and Footer" section - Enter `` in the Header, Body and Footer code text areas, and save. - Preview the resulting post should make the alert prompts go off.