WordPress Simply Schedule Appointments plugin <= 1.6.12.35 - Insecure Direct Object References (IDOR) vulnerability

published 2026-10-15 24 d ago modified 2026-10-16 23 d ago also EUVD-2026-102234

cvss: 6.3; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.2%; EPSS 0.2% chance of exploitation in 30 days, percentile 10%
public exploits: 0; none known

Authorization Bypass Through User-Controlled Key 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 1.6.12.35.

Patch / fix

fixed in 1

NSquared Simply Schedule Appointments 1.6.12.37

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 24 d ago (2026-10-15)

Exploit prediction

0.20% chance of exploitation in the next 30 days, higher than 10% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	6.3	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

Affected products

NSquared Simply Schedule Appointments

Classification

Weakness

CWE-639 Authorization Bypass Through User-Controlled Key

Technology feeds

WordPress rss critical rss

References

patchstack.com /database/wordpress/plugin/simply-schedule-appointments/vulnerability/wordpress-simply-schedule-appointments-p
vdb-entry

Sources

CVE List CVE-2026-110381
NVD CVE-2026-110381

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary