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CVE-2026-59523— WordPress Simply Schedule Appointments plugin <= 1.6.11.11 - Broken Access Control vulnerability

Quick assessment

Affected
NSquared Simply Schedule Appointments
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

nsquared simply schedule appointments是nsquared个人开发者的一套在线预约安排插件。 NSquared Simply Schedule Appointments 1.6.11.11及之前版本存在授权问题漏洞，该漏洞源于缺少授权检查，可能导致利用配置错误的访问控制安全级别。

CVSS 6.5 · Medium EPSS 0.27% · P17

Affected Version Matrix 1

VendorProduct Version RangeStatus
NSquared Simply Schedule Appointments ≤ 1.6.11.11 affected
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I. Basic Information for CVE-2026-59523

Vulnerability Information
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Vulnerability Title
WordPress Simply Schedule Appointments plugin <= 1.6.11.11 - Broken Access Control vulnerability
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
NSquared Simply Schedule Appointments 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
nsquared simply schedule appointments是nsquared个人开发者的一套在线预约安排插件。 NSquared Simply Schedule Appointments 1.6.11.11及之前版本存在授权问题漏洞，该漏洞源于缺少授权检查，可能导致利用配置错误的访问控制安全级别。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
NSquared Simply Schedule Appointments 0 ~ 1.6.11.11 -

II. Public POCs for CVE-2026-59523

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III. Intelligence Information for CVE-2026-59523

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IV. Related Vulnerabilities

Same product: Simply Schedule Appointments
Same vendor: NSquared
Same weakness: CWE-862

V. Comments for CVE-2026-59523

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