---
id: CVE-2026-76586
title: >-
  The Appointment Booking Calendar Plugin and Scheduling Plugin  WordPress
  plugin before 1.6.3 does not verify the amount actually paid against the
  server-side price staged for a booking when confirming an online payment,
  allowing unauthen…
summary: >-
  The Appointment Booking Calendar Plugin and Scheduling Plugin  WordPress
  plugin before 1.6.3 does not verify the amount actually paid against the
  server-side price staged for a booking when confirming an online payment,
  allowing unauthen…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N'
cwe:
  - CWE-284
published: '2026-08-29'
updated: '2026-08-30'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-76586'
references:
  - url: 'https://wpscan.com/vulnerability/bc74bc9b-92ce-434e-a21d-34d7525c8600/'
    label: contact@wpscan.com
tags:
  - nvd
epss: 0.00358
epssPercentile: 0.26768
ingestedAt: '2026-08-30T07:49:07.316Z'
---

## Overview

The Appointment Booking Calendar Plugin and Scheduling Plugin  WordPress plugin before 1.6.3 does not verify the amount actually paid against the server-side price staged for a booking when confirming an online payment, allowing unauthenticated users to have a paid appointment approved for a fraction of its price.

## Remediation

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