Authorisation Failure in TrueBooker Plugin by WordPress
CVE-2026-18777

5.3MEDIUM

Key Information:

Vendor

WordPress
Status
Truebooker
Vendor
CVE Published:
19 August 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-18777?

The TrueBooker WordPress plugin, prior to version 1.2.7, is susceptible to an authorization bypass vulnerability in its AJAX actions. This flaw permits unauthenticated users to manipulate the status of any appointment and trigger notification emails to clients involved. Such unauthorized access can lead to significant mismanagement of appointments and potential breaches of customer trust.

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-2026-18777 - Proof of Concept

References

https://wpscan.com/vulnerability/05a09ba7-b781-4462-8c50-...
exploitvdb-entrytechnical-description

CVSS V3.1

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
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

Mokksh Parekh
WPScan
.