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.
History

Mon, 20 Oct 2025 20:00:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Mon, 20 Oct 2025 13:30:00 +0000

Type Values Removed Values Added
First Time appeared Wordpress
Wordpress wordpress
Vendors & Products Wordpress
Wordpress wordpress

Sat, 18 Oct 2025 03:45:00 +0000

Type Values Removed Values Added
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.
Title Appointments <= 2.2.1 - Unauthenticated PHP Object Injection
Weaknesses CWE-502
References
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}


cve-icon MITRE

Status: PUBLISHED

Assigner: Wordfence

Published: 2025-10-18T03:33:24.194Z

Updated: 2025-10-20T16:32:56.505Z

Reserved: 2025-10-17T15:00:24.290Z

Link: CVE-2017-20206

cve-icon Vulnrichment

Updated: 2025-10-20T16:32:51.560Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2025-10-18T04:15:43.243

Modified: 2025-10-21T19:31:50.020

Link: CVE-2017-20206

cve-icon Redhat

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