GiveWP < 4.16.2 - Authenticated (Give Worker+) Stored Cross-Site Scripting via Sequioa Form

Description

The GiveWP – Donation Plugin and Fundraising Platform plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'sequoia[introduction][image]' parameter in all versions up to, and including, 4.16.1 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with Give Worker-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.