---
id: CVE-2026-87966
title: >-
  The Easy Appointments WordPress plugin before 4.0.2.2 does not perform an
  ownership or authorization check on its unauthenticated
  appointment-reservation endpoint before updating an existing appointment
  identified by a request-supplied i…
summary: >-
  The Easy Appointments WordPress plugin before 4.0.2.2 does not perform an
  ownership or authorization check on its unauthenticated
  appointment-reservation endpoint before updating an existing appointment
  identified by a request-supplied i…
severity: medium
cvss: 5.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N'
cwe:
  - CWE-639
product: Easy Appointments
affected:
  - easy_appointments >= 4.0 < 4.0.2.2
published: '2026-09-18'
updated: '2026-09-18'
sourceUpdated: '2026-09-18T19:08:32.830'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-87966'
references:
  - url: 'https://wpscan.com/vulnerability/e2e625f4-c146-4622-b439-3179c4484613/'
    label: contact@wpscan.com
tags:
  - nvd
  - cve.org
epss: 0.00304
epssPercentile: 0.20608
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-09-18T11:02:32.954621Z'
ingestedAt: '2026-09-18T06:36:37.986Z'
---

## Overview

The Easy Appointments WordPress plugin before 4.0.2.2 does not perform an ownership or authorization check on its unauthenticated appointment-reservation endpoint before updating an existing appointment identified by a request-supplied id, allowing unauthenticated attackers to overwrite, and through a follow-on cleanup delete, arbitrary appointments.

## Remediation

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