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CVE-2026-116557

CRITICAL 9.1 CVSS 3.1
Published
October 31, 2026
Last modified
November 5, 2026
NVD status
Deferred
Reported by
security@wordfence.com
Weakness
CWE-862
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

Description

The WP Booking System - Booking Calendar plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the wpbs_action_ajax_calendar_remove_note() function in versions up to, and including, 2.1.0.5 This makes it possible for authenticated attackers, with Subscriber-level access and above, to delete arbitrary calendar notes belonging to any calendar.

Affected WordPress components

  • WP Booking System – Booking Calendar Plugin · wp-booking-system
    Confirmed match Active
    Up to and including 2.1.0.5
    View on WordPress.org

A confirmed match is backed by the plugin or theme slug. A possible match is based on the product name only and should be verified.

Affected products and versions

  • murgroland WP Booking System – Booking Calendar — Up to and including 2.1.0.5

References

  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/wp-booking-system/tags/2.1.0.5/includes/base/admin/calendar/functions-notes.php#L111
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/wp-booking-system/tags/2.1.0.5/includes/base/admin/calendar/functions-notes.php#L119
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/wp-booking-system/tags/2.1.0.5/includes/base/admin/calendar/functions-notes.php#L123
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/changeset/3765778/wp-booking-system/trunk/includes/base/admin/calendar/functions-notes.php
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/changeset?old=3755940&old_path=%2Fwp-booking-system%2Ftrunk&new=3765778&new_path=%2Fwp-booking-system%2Ftrunk
  • www.wordfence.com https://www.wordfence.com/threat-intel/vulnerabilities/id/b25cc768-3377-41c9-acf5-8f6c993287c9?source=cve
  • nvd.nist.gov Official NVD record