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The EventPrime – Events Calendar, Bookings and Tickets plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'new_event_type_background_color' parameter in all versions up to, and including, 4.3.4.2 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with custom-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This requires the plugin's Guest Submissions setting (allow_submission_by_anonymous_user) to be enabled, which allows unauthenticated attackers to submit event types via the frontend form; when that setting is disabled, exploitation requires at minimum a subscriber-level authenticated account.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Eventprime Event Calendar Management Plugin | — | Update eventprime-event-calendar-management plugin to version 4.3.4.3, or a newer patched version | Jul 9, 2026 | Jul 8, 2026 |
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