Pop-Up Chop Chop <= 2.1.7 is vulnerable to Authenticated Stored Cross-Site Scripting (XSS) vulnerability

The Pop-Up Chop Chop plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the ‘email_data’ parameter in versions up to, and including, 2.1.7 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level permissions and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.