CVE-2026-59523

WordPress Simply Schedule Appointments plugin <= 1.6.11.11 - Broken Access Control vulnerability

Published Jul 13, 2026 CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed
Description
Missing Authorization vulnerability in NSquared Simply Schedule Appointments simply-schedule-appointments allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects Simply Schedule Appointments: from n/a through 1.6.11.11.

Remediation

Vendor Solution

Update the WordPress Simply Schedule Appointments plugin to the latest available version (at least 1.6.12.0).

Tracking

Sign in to view the affected projects.

Advisories

No advisories available
History
Type Values Removed Values Added
Description Missing Authorization vulnerability in NSquared Simply Schedule Appointments simply-schedule-appointments allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects Simply Schedule Appointments: from n/a through <= 1.6.11.11. Missing Authorization vulnerability in NSquared Simply Schedule Appointments simply-schedule-appointments allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects Simply Schedule Appointments: from n/a through 1.6.11.11.
References
Type Values Removed Values Added
First Time appeared Nsquared
Nsquared simply Schedule Appointments
Wordpress
Wordpress wordpress
Vendors & Products Nsquared
Nsquared simply Schedule Appointments
Wordpress
Wordpress wordpress
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description Missing Authorization vulnerability in NSquared Simply Schedule Appointments simply-schedule-appointments allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects Simply Schedule Appointments: from n/a through <= 1.6.11.11.
Title WordPress Simply Schedule Appointments plugin <= 1.6.11.11 - Broken Access Control vulnerability
Weaknesses CWE-862
References
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
Patchstack
Published
Updated
Oct 9, 2026, 4:53 PM
Reserved
Jul 5, 2026, 9:27 PM
Status
Deferred
Published
Jul 13, 2026, 10:16 AM
Modified
Oct 24, 2026, 10:10 PM