How severe is CVE-2025-12166?

High severity. CVSS v3 base score is 7.5 out of 10.

SQL Injection in Croixhaug Appointment Booking Calendar — Simply Schedule Appointments Plugin

CVE-2025-12166

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…

Vulnerability class: SQL Injection

EPSS: 0.001 (29.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

Affected products

Croixhaug Appointment Booking Calendar — Simply Schedule Appointments Plugin — versions 0

Weakness classification (CWE)

CWE-89 — SQL Injection

References

Frequently asked questions

What is CVE-2025-12166?: CVE-2025-12166 is a high-severity vulnerability in Croixhaug Appointment Booking Calendar — Simply Schedule Appointments Plugin, classified under SQL Injection. CVSS score: 7.5/10. Published 2026-01-14.
How severe is CVE-2025-12166?: High severity. CVSS v3 base score is 7.5 out of 10.