Authorization Flaw in TrueBooker Plugin for WordPress
CVE-2026-18776

9.8CRITICAL

Key Information:

Vendor

WordPress
Status
Truebooker
Vendor
CVE Published:
19 August 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-18776?

The TrueBooker plugin for WordPress prior to version 1.2.7 contains a significant vulnerability due to inadequate authorization checks within specific AJAX actions. This flaw enables unauthenticated users to alter the email addresses of any user accounts, including those of administrators. By changing the email address, attackers can exploit the password reset functionality to take over user accounts, posing a serious risk to the integrity and security of affected websites.

Affected Version(s)

TrueBooker 0 < 1.2.7

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-18776 - Proof of Concept

References

https://wpscan.com/vulnerability/4b6abb2d-941b-429f-a480-...
exploitvdb-entrytechnical-description

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

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Abdullah Kareem
WPScan
.