Event Tickets and Registration vulnerabilities

The Event Tickets and Registration plugin for WordPress is vulnerable to generic SQL Injection via the 'orderby' parameter in all versions up to, and including, 5.29.5 due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query. This makes it possible for authenticated attackers, with contributor-level access and above, to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database. A Contributor-level user can reach the vulnerable code path by supplying a post_id they authored, as the can_access_page() gate requires only post authorship rather than the edit_others_posts capability for post owners.

The Event Tickets and Registration plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the Stripe OAuth return endpoint in all versions up to, and including, 5.27.4. This makes it possible for unauthenticated attackers to overwrite the site's Stripe merchant credentials, diverting all subsequent payment processing to the attacker's Stripe account.

The Event Tickets and Registration WordPress plugin before version 5.28.4 does not properly escape event titles before outputting them in a ticket history log. This allows users with the Editor role and above to perform Stored Cross-Site Scripting (XSS) attacks that execute against higher-privileged users on multisite installations.