Vulnerability in Online Scheduling and Appointment Booking System – Bookly — CVE-2026-12626

What to do now

Update Online Scheduling and Appointment Booking System – Bookly to 28.3 or later.

Affected versions

• Everything up to and including 28.2

The Online Scheduling and Appointment Booking System – Bookly plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 28.2 via deserialization of untrusted input via the ‘value’ parameter. This makes it possible for authenticated attackers, with custom-level access and above, to inject a PHP Object. No known gadget chain is available.

This description is reproduced verbatim from the public vulnerability record.

• https://www.wordfence.com/threat-intel/vulnerabilities/id/56c5e045-e91c-4517-8164-a21c3e99623b?source=api-prod

Part of this record comes from Wordfence Intelligence. Original: https://www.wordfence.com/threat-intel/vulnerabilities/id/56c5e045-e91c-4517-8164-a21c3e99623b
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