Vulnerability 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.
CVSS Score
CRITICAL
Related Weaknesses (CWE)
References
- https://plugins.trac.wordpress.org/browser/wp-booking-system/tags/2.1.0.5/includ
- https://plugins.trac.wordpress.org/browser/wp-booking-system/tags/2.1.0.5/includ
- https://plugins.trac.wordpress.org/browser/wp-booking-system/tags/2.1.0.5/includ
- https://plugins.trac.wordpress.org/changeset/3765778/wp-booking-system/trunk/inc
- https://plugins.trac.wordpress.org/changeset?old=3755940&old_path=%2Fwp-booking-
- https://www.wordfence.com/threat-intel/vulnerabilities/id/b25cc768-3377-41c9-acf
FAQ
What is CVE-2026-116557?
CVE-2026-116557 is a vulnerability with a CVSS score of 9.1 (CRITICAL). 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() functi...
How severe is CVE-2026-116557?
CVE-2026-116557 has been rated CRITICAL with a CVSS base score of 9.1/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-116557?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.