Appointment Hour Booking – Booking Calendar: Cross-site scripting
Appointment Hour Booking – Booking Calendar is affected by cross-site scripting. Exploitation requires at least administrator-level access. Injected script can execute in the affected site's origin when the vulnerable output is viewed.
- Component
- Appointment Hour Booking – Booking Calendar
- Plugin slug
appointment-hour-booking- Affected
- See vendor advisory
- Safe version
- See mitigation notes
- Published
- Jan 28, 2026
This CVE was published Jan 28, 2026 and is one of 12 known issues for this plugin.
Patch or disable the affected component.
Update Appointment Hour Booking – Booking Calendar to a release outside the affected range, or disable and remove it until a fixed version is available.
Technical description
The Appointment Hour Booking – Booking Calendar plugin for WordPress is vulnerable to Stored Cross-Site Scripting via form field configuration parameters in all versions up to, and including, 1.5.60 due to insufficient input sanitization and output escaping on the 'Min length/characters' and 'Max length/characters' field configuration values. This makes it possible for authenticated attackers, with administrator-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses the form builder interface. This only affects multi-site installations and installations where unfiltered_html has been disabled.
CVE / CNA vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N