Appointment Hour Booking – Booking Calendar <= 1.5.86 - Authenticated (Contributor+) Stored Cross-Site Scripting

6.4
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE CVE-2026-65514
CVSS 6.4 (Medium)
Publicly Published July 23, 2026
Last Updated July 27, 2026
Researcher Ananda Dhakal

Description

The Appointment Hour Booking – Booking Calendar plugin for WordPress is vulnerable to Stored Cross-Site Scripting in versions up to, and including, 1.5.86 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Learn more about Cross-Site Scripting vulnerabilities and how to prevent them.

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Vulnerability Details for Appointment Hour Booking – Booking Calendar

Software Type Plugin
Software Slug appointment-hour-booking (view on wordpress.org)
Patched? Yes
Remediation Update to version 1.5.87, or a newer patched version
Affected Version
  • <= 1.5.86
Patched Version
  • 1.5.87

Recent vulnerabilities in Appointment Hour Booking – Booking Calendar

# Title CVE ID CVSS Researchers Date
1 Appointment Hour Booking – Booking Calendar <= 1.5.60 - Authenticated (Administrator+) Stored Cross-Site Scripting via 'Min/Max Length' Field Configuration CVE-2026-1083 4.4 ALockWooD January 27, 2026
2 Appointment Hour Booking <= 1.4.56 - Captcha Bypass CVE-2024-32720 5.3 Mochamad Sofyan April 22, 2024
3 Appointment Hour Booking <= 1.4.23 - Missing Authorization to Double Booking CVE-2023-45649 5.3 konagash October 11, 2023
4 Appointment Hour Booking <= 1.3.72 - Unauthenticated iFrame Injection via Appointment Form CVE-2022-4035 7.2 Luca Greeb, Andreas Krüger November 29, 2022
5 Appointment Hour Booking <= 1.3.72 - CSV Injection CVE-2022-4034 5.8 Luca Greeb, Andreas Krüger November 29, 2022
6 Appointment Hour Booking <= 1.3.72 - CAPTCHA Bypass CVE-2022-4036 5.3 Luca Greeb, Andreas Krüger November 29, 2022
7 Appointment Hour Booking <= 1.3.71 - Missing Authorization CVE-2022-41692 4.3 István Márton October 30, 2022
8 Appointment Hour Booking <= 1.3.55 - Authenticated Stored Cross-Site Scripting CVE-2022-1710 4.8 Bruno Halltari May 23, 2022
9 Appointment Hour Booking <= 1.3.16 - Cross-Site Scripting CVE-2021-24712 6.4 Shivam Rai September 10, 2021
10 Appointment Hour Booking <= 1.3.15 Admin+ Stored Cross-Site Scripting CVE-2021-24673 5.5 Asif Nawaz Minhas September 6, 2021

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