SQL Injection in Croixhaug Appointment Booking Calendar — Simply Schedule Appointments Plugin
CVE-2026-3658
The Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin plugin for WordPress is vulnerable to SQL Injection via the 'fields' parameter in all versions up to, and including, 1.6.10.0 due to insufficient escaping on th…
Vulnerability class: SQL Injection
EPSS: 0.001 (29.3th 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
Weakness classification (CWE)
References
- www.wordfence.com/threat-intel/vulnerabilities/id/67c7b9b2-e73f-47fe-aecc-14e99…
- plugins.trac.wordpress.org/browser/simply-schedule-appointments/trunk/includes/…
- plugins.trac.wordpress.org/browser/simply-schedule-appointments/trunk/includes/…
- plugins.trac.wordpress.org/browser/simply-schedule-appointments/trunk/includes/…
- plugins.trac.wordpress.org/changeset/3485143/
Frequently asked questions
- What is CVE-2026-3658?
- CVE-2026-3658 is a high-severity vulnerability in Croixhaug Appointment Booking Calendar — Simply Schedule Appointments Plugin, classified under SQL Injection. CVSS score: 7.5/10. Published 2026-03-19.
- How severe is CVE-2026-3658?
- High severity. CVSS v3 base score is 7.5 out of 10.