---
id: CVE-2026-59523
title: >-
  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 t…
summary: >-
  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 t…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N'
cwe:
  - CWE-862
published: '2026-07-13'
updated: '2026-10-09'
sourceUpdated: '2026-10-09T17:16:47.900'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-59523'
references:
  - url: >-
      https://patchstack.com/database/wordpress/plugin/simply-schedule-appointments/vulnerability/wordpress-simply-schedule-appointments-plugin-1-6-11-11-broken-access-control-vulnerability?_s_id=cve
    label: audit@patchstack.com
tags:
  - nvd
epss: 0.00266
epssPercentile: 0.17031
ingestedAt: '2026-10-09T18:07:39.403Z'
---

## Overview

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

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.