Booktics <= 1.0.21 - Unauthenticated PHP Object Injection

8.1
Deserialization of Untrusted Data
CVE CVE-2026-57621
CVSS 8.1 (High)
Publicly Published June 29, 2026
Last Updated July 10, 2026
Researcher hhhai

Description

The Booktics plugin for WordPress is vulnerable to PHP Object Injection in versions up to, and including, 1.0.21 via deserialization of untrusted input. This makes it possible for unauthenticated attackers to inject a PHP Object. No known POP chain is present in the vulnerable software. If a POP chain is present via an additional plugin or theme installed on the target system, it could allow the attacker to delete arbitrary files, retrieve sensitive data, or execute code.

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Vulnerability Details for Booktics – Appointment Booking Calendar for Service Businesses

Software Type Plugin
Software Slug booktics (view on wordpress.org)
Patched? Yes
Remediation Update to version 1.0.22, or a newer patched version
Affected Version
  • <= 1.0.21
Patched Version
  • 1.0.22

Recent vulnerabilities in Booktics – Appointment Booking Calendar for Service Businesses

# Title CVE ID CVSS Researchers Date
1 Booktics – Appointment Booking Calendar for Service Businesses <= 1.0.28 - Missing Authorization CVE-2026-107418 4.3 dzeusking October 12, 2026
2 Booktics – Appointment Booking Calendar for Service Businesses <= 1.0.28 - Missing Authorization CVE-2026-108477 5.3 myhappyhoon October 12, 2026
3 Booktics – Appointment Booking Calendar for Service Businesses <= 1.0.27 - Missing Authorization CVE-2026-104390 4.3 Oly Hossen October 7, 2026
4 Booktics – Booking Calendar for Appointments and Service Businesses <= 1.0.23 - Missing Authorization CVE-2026-11446 5.3 revblock September 10, 2026
5 Booktics – Appointment Booking Calendar for Service Businesses <= 1.0.24 - Missing Authorization CVE-2026-62135 5.3 Supakiad S. (m3ez) September 10, 2026
6 Booktics 1.0.22 - Authenticated (Subscriber+) SQL Injection CVE-2026-28002 6.5 Abdullah Kareem "cyberkareem" August 12, 2026
7 Booktics <= 1.0.16 - Missing Authorization to Get Items via REST API endpoints CVE-2026-1919 5.3 Kazuma Matsumoto March 9, 2026
8 Booktics <= 1.0.16 - Missing Authorization to Addon Plugin Installation CVE-2026-1920 5.3 Kazuma Matsumoto March 9, 2026
9 Booktics <= 1.0.16 - Missing Authorization CVE-2026-39585 5.3 Simone Maion February 2, 2026

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