CVE-2026-116557 — Vulnerability intelligence

murgroland — WP Booking System – Booking Calendar

Published: 2026-10-31T06:44:21.690Z

CVSS

9.1

CISA KEV

Not listed; not proof of no exploitation

Original source text (not a translation)

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.

Sources

• CVE-2026-116557
• Original advisory
• Original advisory
• Original advisory
• Original advisory
• Original advisory
• Original advisory
• CVE-2026-116557