Appointments <= 2.2.1 - Unauthenticated PHP Object Injection

9.8
Deserialization of Untrusted Data
CVSS 9.8 (Critical)
Publicly Published October 2, 2017
Last Updated February 3, 2023
Researcher Matt Barry - Wordfence

Description

The Appointments plugin for WordPress is vulnerable to PHP Object Injection in versions up to, and including, 2.2.1 via deserialization of untrusted input from the `wpmudev_appointments` cookie. This allows unauthenticated attackers to inject a PHP Object. Attackers were actively exploiting this vulnerability with the WP_Theme() class to create backdoors.

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Vulnerability Details for Appointments

Software Type Plugin
Software Slug appointments (view on wordpress.org)
Patched? Yes
Remediation Update to version 2.2.2, or a newer patched version
Affected Version
  • < 2.2.2
Patched Version
  • 2.2.2

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