The Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin plugin for WordPress is vulnerable to blind SQL Injection in all versions up to, and including, 1.6.9.27. This is due to the `db_where_conditions` method in the `TD_DB_Model` class failing to prevent the `append_where_sql` parameter from being passed through JSON request bodies, while only checking for its presence in the `$_REQUEST` superglobal. This makes it possible for unauthenticated attackers to append arbitrary SQL commands to queries and extract sensitive information from the database via the `append_where_sql` parameter in JSON payloads granted they have obtained a valid `public_token` that is inadvertently exposed during the booking flow.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
None
No data modification
Availability
None
No disruption
CVSS Vector v3.1
Weakness Type (CWE)
References 10
https://plugins.trac.wordpress.org/browser/simply-schedule-appointments/tags/1.…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/simply-schedule-appointments/tags/1.…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/simply-schedule-appointments/tags/1.…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/simply-schedule-appointments/tags/1.…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/simply-schedule-appointments/trunk/i…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/simply-schedule-appointments/trunk/i…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/simply-schedule-appointments/trunk/i…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/simply-schedule-appointments/trunk/i…
security@wordfence.com
https://plugins.trac.wordpress.org/changeset/3475885/simply-schedule-appointmen…
security@wordfence.com
https://www.wordfence.com/threat-intel/vulnerabilities/id/71642341-9fe0-44a9-88…
security@wordfence.com