CVE-2026-116557
Critical
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.
SeverityCritical
CVSS9.1
Exploit probability—
ProductWP Booking System – Booking Calendar
PublishedOct 31, 2026
First seenNov 4, 2026
Weakness typeCWE-862Missing authorization
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| murgroland WP Booking System – Booking Calendar | v ≤ 2.1.0.5 | — |
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