CVE-2022-4036 MEDIUM

CVE-2022-4036: Appointment Hour Booking <= 1.3.72 - CAPTCHA Bypass

Vendor Codepeople
Product Appointment Hour Booking – Booking Calendar
Weakness CWE-804
Published November 29, 2022
Last update April 8, 2026
View on NVD All CVEs

CVSS base score

5.3/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality Low
Integrity None

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

What the vulnerability does

01Description

The Appointment Hour Booking plugin for WordPress is vulnerable to CAPTCHA bypass in versions up to, and including, 1.3.72. This is due to the use of insufficiently strong hashing algorithm on the CAPTCHA secret that is also displayed to the user via a cookie.

Explanation of Vulnerability in Simple Terms

02Summary

Appointment Hour Booking versions up to 1.3.72 expose sensitive booking information to unauthenticated attackers over the network. The vulnerability allows reading non-public data without requiring user interaction or special network conditions. No code execution or data modification is possible through this flaw.

What an attacker can do

03Attacker Capabilities

Read sensitive booking data without authentication.

Potential impact on your site

04Site Impact

Booking details and customer information may be visible to anyone on the internet.

Conditions required to exploit

05Prerequisites

Network access to the site; no authentication or user interaction required.

Key dates

06Disclosure timeline

November 29, 2022 CVE published
April 8, 2026 Record updated