Arbitrary Pricing Vulnerability in Appointment Hour Booking Plugin for WordPress
CVE-2026-16282

5.3MEDIUM

Key Information:

Vendor

WordPress
Status
Appointment Hour Booking
Vendor
CVE Published:
8 August 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-16282?

The Appointment Hour Booking plugin for WordPress contains a flaw that allows unauthenticated users to submit a booking price that is not validated against the server-side configured service price. This lack of validation means users can set any final price, including zero or negative values, which can corrupt booking and payment records. Prompt updates to the plugin are advisable to mitigate the risk of exploitation.

Affected Version(s)

Appointment Hour Booking 0 < 1.5.88

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-2026-16282 - Proof of Concept

References

https://wpscan.com/vulnerability/e87116af-d202-434b-9f47-...
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

Researcher1: Alessandro Greco aka Aleff; Researcher2: Giovambattista Ianni; Company/Organization: University of Calabria (UNICAL)
WPScan
.