Missing authorization in WP Booking System exposes booking data
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- 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-862.
Summary
The WP Booking System (Booking Calendar) plugin for WordPress is affected through 2.1.0.3. A missing authorization check (CWE-862) in the wpbs_refresh_calendar_editor AJAX action lets authenticated users with subscriber-level access or higher extract private per-event booking descriptions and booking IDs from any calendar managed by the site.
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 Sensitive Information Exposure in all versions up to, and including, 2.1.0.3 via the 'id' parameter. This makes it possible for authenticated attackers, with subscriber-level access and above, to extract private per-event booking descriptions and booking IDs from any calendar managed by the site.
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 2.1.0.3 | — | No fix listed | CNA |
- WP Booking System – Booking Calendar Vendormurgroland Affected up to 2.1.0.3 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
- 2026-10-18 Threatist record created from CVE-2026-109368
- 2026-10-18 Alias added: GHSA-4x57-h4wj-759x
References
Other 7
- https://www.wordfence.com/threat-intel/vulnerabilities/id/164a276a-612f-416f-b9ef-1c2e6dd0e8e4?source=cve
- https://plugins.trac.wordpress.org/browser/wp-booking-system/tags/2.1.0.2/includes/base/admin/calendar/functions-actions-ajax-calendar.php#L12
- https://plugins.trac.wordpress.org/browser/wp-booking-system/tags/2.1.0.2/includes/base/admin/calendar/functions-actions-ajax-calendar.php#L62
- https://plugins.trac.wordpress.org/browser/wp-booking-system/tags/2.1.0.2/includes/base/admin/calendar/class-calendar-editor-outputter.php#L484
- https://plugins.trac.wordpress.org/browser/wp-booking-system/tags/2.1.0.2/includes/base/admin/calendar/class-calendar-editor-outputter.php#L432
- https://plugins.trac.wordpress.org/changeset?old=3730163&old_path=%2Fwp-booking-system%2Ftrunk&new=&new_path=%2Fwp-booking-system%2Ftrunk
- https://plugins.trac.wordpress.org/changeset/3750120/wp-booking-system/trunk/includes/base/admin/calendar/functions-actions-ajax-calendar.php
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-2026-70283 SQL injection in WP Booking System WordPress plugin CVSS 3.1MEDIUM 6.5
- TI-2026-75287 SQL injection in WP Booking System plugin via orderby parameter CVSS 3.1MEDIUM 4.9
Sources
- CVE-2026-109368 · CVE Program
- CVE-2026-109368 · NVD
- FIRST EPSS
- GHSA-4x57-h4wj-759x · 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