# CVE-2026-111178: WP Booking System SQL injection in orderby parameter

Source: https://junglewise.ai/threats/cve-2026-111178-the-wp-booking-system-booking-calendar-plugin-for-wordpress-is  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-16. Updated: 2026-10-16  
License: CC BY 4.0 with a link back

CVE-2026-111178 · Severity: medium · CVSS 4.9 · Published 2026-10-16

WP Booking System is a WordPress plugin that manages booking calendars for websites. An authenticated administrator can inject malicious SQL commands through the booking calendar interface to extract sensitive data from the website's database. The vulnerability requires the calendar to have more than 200 bookings to be exploitable.

Technologies: [WP Booking System Booking Calendar](https://junglewise.ai/threats/technologies/wp-booking-system-booking-calendar-1). Vendors: [WP Booking System](https://junglewise.ai/threats/vendors/wp-booking-system).

## Quick answers

**Is CVE-2026-111178 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-111178 being exploited in the wild.

**How severe is CVE-2026-111178?** Medium severity, with a CVSS score of 4.9, published 16 October 2026.

**Which products and versions are affected?** WP Booking System Booking Calendar up to 2.1.0.1.

**Is there a fix for CVE-2026-111178?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-111178 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-111178?** Check whether you run WP Booking System Booking Calendar at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The plugin fails to properly escape or prepare the 'data[orderby]' parameter in an AJAX handler, allowing SQL injection. An authenticated administrator-level attacker can craft malicious input to append arbitrary SQL queries to existing database queries, extracting sensitive information. The vulnerability is only reachable when the AJAX handler processes the use_ajax branch with over 200 bookings in the calendar.

## Affected products

- WP Booking System Booking Calendar up to 2.1.0.1

## Timeline

- 2026-10-16: disclosed

## References

- [https://plugins.trac.wordpress.org/browser/wp-booking-system/tags/2.1.0.1/includes/abstracts/abstract-class-object-db.php](https://plugins.trac.wordpress.org/browser/wp-booking-system/tags/2.1.0.1/includes/abstracts/abstract-class-object-db.php)
- [https://plugins.trac.wordpress.org/browser/wp-booking-system/tags/2.1.0.1/includes/base/admin/booking/class-bookings-outputter.php](https://plugins.trac.wordpress.org/browser/wp-booking-system/tags/2.1.0.1/includes/base/admin/booking/class-bookings-outputter.php)