CVE-2026-59523

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

6.5 Medium

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.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: Low
Integrity: Low
Availability: None

Exploit likelihood

0.27%Unchanged since Jul 13, 2026

What each source reports

CVE List Score used 6.5

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

Record: CVE-2026-59523
CVSS 3.1: 6.5 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Weakness: CWE-862
Updated: 2026-11-02

EUVDEUVD-2026-43434 6.5

Record: EUVD-2026-43434
CVSS 3.1: 6.5 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Updated: 2026-11-02

GitHub AdvisoriesGHSA-vj2r-ffwf-623h 6.5

Missing Authorization vulnerability in NSquared Simply Schedule Appointments simply-schedule...

Record: GHSA-vj2r-ffwf-623h
CVSS 3.1: 6.5 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Weakness: CWE-862
Updated: 2026-11-02

NVD 6.5

Record: CVE-2026-59523
CVSS 3.1: 6.5 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Weakness: CWE-862
Updated: 2026-11-02

Affected products

nsquared simply schedule appointments

History

History
Recorded	Changed	Sources
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-59523 is a medium vulnerability (CVSS 6.5) in Nsquared Simply Schedule Appointments, published July 13, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.27%, the 18th percentile. No source names a fixed version.