Appointment Booking Calendar <= 1.6.9.27 - Unauthenticated SQL Injection via 'append_where_sql' Parameter
| CVE | CVE-2026-1708 |
|---|---|
| CVSS | 7.5 (High) |
| Publicly Published | March 10, 2026 |
| Last Updated | March 11, 2026 |
| Researcher |
d.v4n_s3c
|
Description
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.
Learn more about SQL Injection vulnerabilities and how to prevent them.
References
- plugins.trac.wordpress.org
- plugins.trac.wordpress.org
- plugins.trac.wordpress.org
- plugins.trac.wordpress.org
- plugins.trac.wordpress.org
- plugins.trac.wordpress.org
- plugins.trac.wordpress.org
- plugins.trac.wordpress.org
- plugins.trac.wordpress.org
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Vulnerability Details for Simply Schedule Appointments
| Software Type | Plugin |
|---|---|
| Software Slug | simply-schedule-appointments (view on wordpress.org) |
| Patched? | Yes |
| Remediation | Update to version 1.6.9.29, or a newer patched version |
| Affected Version |
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| Patched Version |
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Recent vulnerabilities in Simply Schedule Appointments
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