The Ziggeo plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's 'ziggeoevent' shortcode in all versions up to, and including, 3.1 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

The Ziggeo plugin for WordPress is vulnerable to Missing Authorization in all versions up to, and including, 3.1.1. The wpajaxziggeoajax handler only verifies a nonce (checkajaxreferer) but performs no capability checks via currentusercan(). Furthermore, the nonce ('ziggeoajaxnonce') is exposed to all logged-in users on every page via the wphead and adminhead hooks . This makes it possible for authenticated attackers, with Subscriber-level access and above, to invoke multiple administrative operations including: saving arbitrary translation strings (translationspanelsavestrings via updateoption('ziggeotranslations')), creating/updating/deleting event templates (eventeditorsavetemplate/updatetemplate/removetemplate via updateoption('ziggeoevents')), modifying SDK application settings (sdkapplications operations), and managing notifications (notificationhandler via updateoption('ziggeonotifications')).