The WP Travel – Ultimate Travel Booking System, Tour Management Engine plugin for WordPress is vulnerable to SQL Injection via the 'booking_itinerary' parameter of the 'wptravel_get_booking_data' function in all versions up to, and including, 10.0.0 due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query. This makes it possible for authenticated attackers, with Subscriber-level access and above, to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database.

Missing Authorization vulnerability in Veribo, Roland Murg WP Booking System allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects WP Booking System: from n/a through 2.0.19.2.

Exposure of Sensitive System Information to an Unauthorized Control Sphere vulnerability in Veribo, Roland Murg WP Booking System.This issue affects WP Booking System: from n/a through 2.0.19.10.

The Freemius SDK, as used by hundreds of WordPress plugin and theme developers, was vulnerable to Cross-Site Request Forgery and Information disclosure due to missing capability checks and nonce protection on the _get_debug_log, _get_db_option, and the _set_db_option functions in versions up to, and including 2.4.2. Any WordPress plugin or theme running a version of Freemius less than 2.4.3 is vulnerable.

The WP Booking System – Booking Calendar plugin for WordPress is vulnerable to Reflected Cross-Site Scripting due to the use of add_query_arg & remove_query_arg without appropriate escaping on the URL in all versions up to, and including, 2.0.19.8. 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.

Auth. (admin+) Cross-Site Scripting (XSS) vulnerability in Veribo, Roland Murg WP Booking System – Booking Calendar plugin <= 2.0.18 versions.

The WP Booking System WordPress plugin before 2.0.15 was affected by a reflected xss in wp-booking-system on the wpbs-calendars admin page.

The WP Booking System plugin 1.5.1 for WordPress has no CSRF protection, which allows attackers to reach certain SQL injection issues that require administrative access.

Cross-site scripting vulnerability in WP Booking System Free version prior to version 1.4 and WP Booking System Premium version prior to version 3.7 allows remote attackers to inject arbitrary web script or HTML via unspecified vectors.