My Calendar < 3.4.24 is vulnerable to Authenticated Stored XSS vulnerability

The My Calendar plugin for WordPress is vulnerable to Stored Cross-Site Scripting via events in all versions up to, and including, 3.4.23 due to insufficient input sanitization and output escaping on event dates. This makes it possible for authenticated attackers with, admin-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.