Account Takeover Vulnerability in TrueBooker Plugin for WordPress
CVE-2026-16142

9.8CRITICAL

Key Information:

Vendor

WordPress
Status
Truebooker – Appointment Booking And Scheduler System
Vendor
CVE Published:
15 August 2026

What is CVE-2026-16142?

The TrueBooker plugin for WordPress is susceptible to unauthorized account takeover due to a flaw in its AJAX handler, add_front_user_update(). This vulnerability allows unauthenticated users to submit arbitrary values for the truebooker_wp_user_id, which are then processed without proper authentication checks. Consequently, an attacker can change the email address associated with any WordPress user account, even administrators. By exploiting this weakness, an attacker can receive a password reset link at the modified email address, facilitating account takeover. Versions up to and including 1.2.6 are affected, highlighting the critical need for users to update and secure their installations.

Affected Version(s)

TrueBooker – Appointment Booking and Scheduler System 0 <= 1.2.6

References

https://www.wordfence.com/threat-intel/vulnerabilities/id...
https://plugins.trac.wordpress.org/changeset/3640018/true...

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Nabil Irawan
.