Threat intelligence

Simply Schedule Appointments <= 1.6.9.9 - Unauthenticated SQL Injection via `order` and `append_where_sql` Parameters

CVE-2025-12166 · simply-schedule-appointments

Important: Seeing this vulnerability listed does not mean your website is affected. Exposure depends on whether you run Simply Schedule Appointments at a vulnerable version. How SiteRespond intelligence works

Vulnerability: Simply Schedule Appointments <= 1.6.9.9 - Unauthenticated SQL Injection via `order` and `append_where_sql` Parameters
Affected software: simply-schedule-appointments(Plugin)
Affected versions: ≤ 1.6.9.9
Authentication: Unauthenticated
Vulnerability type: SQL injection
CVE: CVE-2025-12166
Published: 14 January 2026
CISA KEV: Not listed in CISA KEV at last catalog refresh
Impact: May allow attackers to read or modify database contents beyond intended access.
Source: Data imported from Wordfence Intelligence (advisory 5214a399-21a4-4573-9840-1d5043781bc0). Methodology and redistribution notes

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