The Community Events plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'ce_venue_name' parameter in all versions up to, and including, 1.5.7 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with administrator-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
https://plugins.trac.wordpress.org/browser/community-events/trunk/community-events.php#L1403
https://plugins.trac.wordpress.org/browser/community-events/tags/1.5.7/community-events.php#L779
https://plugins.trac.wordpress.org/browser/community-events/tags/1.5.7/community-events.php#L1403