YaySMTP – Simple WP SMTP Mail <= 2.2 - Stored Cross-Site Scripting

The YaySMTP – Simple WP SMTP Mail plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'settings[fromName]' parameter in versions up to, and including, 2.2 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with minimal permissions such as a subscriber, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.