The Booking Calendar plugin for WordPress is vulnerable to PHP Object Injection via the [bookingflextimeline] shortcode in versions up to, and including, 9.1. This could be exploited by subscriber-level users and above to call arbitrary PHP objects on a vulnerable site.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Booking Plugin | — | Update booking plugin to version 9.1.1, or a newer patched version | May 15, 2025 | Apr 18, 2022 |
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