SQL injection in WP Booking System plugin via orderby parameter
Key facts
- Attack vector
- Network
- Privileges required
- High
- User interaction
- None
- Attack complexity
- Low
- Impact type
- SQL injection
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-89.
Summary
The Booking Calendar plugin (WP Booking System) for WordPress is affected in all versions up to and including 2.1.0.1. Insufficient escaping and preparation of the data[orderby] parameter in a SQL query lets attackers inject SQL (CWE-89). An authenticated attacker with administrator access or higher can append queries to extract sensitive information from the database, but only on a calendar with more than 200 bookings.
Written with Claude Haiku 5.5 from the sources below · 2026-10-28
Description from the CNA
The WP Booking System – Booking Calendar plugin for WordPress is vulnerable to generic SQL Injection via the 'data[orderby]' parameter in all versions up to, and including, 2.1.0.1 due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query. This makes it possible for authenticated attackers, with administrator-level access and above, to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database. Exploitation requires the targeted calendar to have more than 200 bookings, as the orderby value is only forwarded to the database layer when the AJAX handler takes the use_ajax branch; an Administrator can satisfy this condition by creating bookings directly.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| murgroland | WP Booking System – Booking Calendar | up to 2.1.0.1 | — | No fix listed | CNA |
- WP Booking System – Booking Calendar Vendormurgroland Affected up to 2.1.0.1 Fixed in — No fix listed CNA
Remediation
The sources list no fixed version for WP Booking System (Booking Calendar).
Written with Claude Haiku 5.5 from the sources below · 2026-10-28
Timeline
- 2026-10-16 Threatist record created from CVE-2026-111178
- 2026-10-16 Alias added: GHSA-936g-2qxf-mq79
References
Other 7
- https://www.wordfence.com/threat-intel/vulnerabilities/id/12923175-4db4-4afc-9e9b-b9f139f24a79?source=cve
- https://plugins.trac.wordpress.org/browser/wp-booking-system/tags/2.1.0.1/includes/abstracts/abstract-class-object-db.php#L83
- https://plugins.trac.wordpress.org/browser/wp-booking-system/tags/2.1.0.1/includes/base/booking/class-object-db-bookings.php#L165
- https://plugins.trac.wordpress.org/browser/wp-booking-system/tags/2.1.0.1/includes/base/admin/booking/class-bookings-outputter.php#L214
- https://plugins.trac.wordpress.org/browser/wp-booking-system/tags/2.1.0.1/includes/base/admin/booking/functions-actions-booking.php#L219
- https://plugins.trac.wordpress.org/changeset?old=3732620&old_path=%2Fwp-booking-system%2Ftrunk&new=&new_path=%2Fwp-booking-system%2Ftrunk
- https://plugins.trac.wordpress.org/changeset?reponame=&new=3736389%40wp-booking-system%2Ftags%2F2.1.0.2&old=3732637%40wp-booking-system%2Ftags%2F2.1.0.1
More murgroland vulnerabilities
- TI-2026-83495 Missing authorization in WP Booking System allows note deletion CVSS 3.1CRITICAL 9.1
- TI-2026-76013 Missing authorization in WP Booking System exposes booking emails CVSS 3.1HIGH 7.5
- TI-2026-76022 Missing authorization in WP Booking System allows access escalation CVSS 3.1MEDIUM 6.8
- TI-2026-76021 Missing authorization in WP Booking System exposes booking data CVSS 3.1MEDIUM 6.5
- TI-2026-70283 SQL injection in WP Booking System WordPress plugin CVSS 3.1MEDIUM 6.5
Sources
- CVE-2026-111178 · CVE Program
- CVE-2026-111178 · NVD
- FIRST EPSS
- GHSA-936g-2qxf-mq79 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences