CVE-2025-12166
Simply Schedule Appointments <= 1.6.9.9 - Unauthenticated SQL Injection via `order` and `append_where_sql` Parameters
CVSS Score
7.5
EPSS Score
0.0%
EPSS Percentile
0th
The Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin plugin for WordPress is vulnerable to blind SQL Injection via the `order` and `append_where_sql` parameters in all versions up to, and including, 1.6.9.9 due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query. This makes it possible for unauthenticated attackers to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database.
| CWE | CWE-89 |
| Vendor | croixhaug |
| Product | appointment booking calendar — simply schedule appointments booking plugin |
| Published | Jan 14, 2026 |
| Last Updated | Apr 8, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
croixhaug / Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin
0 ≤ 1.6.9.9
References
Credits
Angus Girvan