Booking Calendar

The Booking Calendar plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the 'wpbc_auto_fill' parameter in all versions up to, and including, 11.8.3 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link.

Published: 2026-09-22T05:30:43.607Z
Updated: 2026-09-22T12:44:10.086Z

The Booking Calendar plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the 'options' parameter in all versions up to, and including, 11.8.2 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link. The nonce check is bypassed by default because the 'booking_is_nonce_at_front_end' option ships disabled, allowing unauthenticated requests to reach the vulnerable sink without any verification.

Published: 2026-09-18T06:38:56.753Z
Updated: 2026-09-18T14:31:43.589Z

The Booking Calendar plugin for WordPress is vulnerable to Privilege Escalation in all versions up to, and including, 11.8.2 via the `wpbc_ajax_option_save` AJAX action. The vulnerability exists because the `handle_ajax_save()` function applies per-option safeguards only to names explicitly registered via `register_option_policy()`, causing `get_option_policy()` to return an empty policy — bypassing all can_save, force_mode, and allowed_keys checks — for any unregistered option name, including core WordPress options, while an attacker-controlled `data_name` parameter passes through `sanitize_key()` and is written directly to `update_option()` without restriction. This makes it possible for authenticated attackers with Editor-level access and above to escalate their privileges to Administrator by writing core WordPress options such as `default_role=administrator` and `users_can_register=1`, then self-registering a new Administrator account. The nonce check does not meaningfully restrict this attack, as both the nonce value and nonce action are attacker-supplied POST parameters, and a valid nonce is trivially obtainable via `admin-ajax.php?action=rest-nonce`.

Published: 2026-09-18T06:38:54.974Z
Updated: 2026-09-18T18:32:21.018Z

Unauthenticated Broken Access Control in Booking Calendar <= 11.7 versions.

Published: 2026-09-17T13:24:53.587Z
Updated: 2026-09-19T02:23:47.056Z

Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') vulnerability in wpdevelop Booking Calendar booking allows Blind SQL Injection.This issue affects Booking Calendar: from n/a through <= 10.14.15.

Published: 2026-03-13T11:42:03.699Z
Updated: 2026-04-29T09:51:57.850Z