---
id: CVE-2026-16650
title: >-
  The Charitable WordPress plugin before 1.8.12 does not verify the authenticity
  of incoming Square payment webhook events in a default configuration, allowing
  unauthenticated attackers to forge webhook notifications that mark donations
  as…
summary: >-
  The Charitable WordPress plugin before 1.8.12 does not verify the authenticity
  of incoming Square payment webhook events in a default configuration, allowing
  unauthenticated attackers to forge webhook notifications that mark donations
  as…
severity: medium
cvss: 5.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N'
cwe:
  - CWE-345
published: '2026-08-21'
updated: '2026-10-16'
sourceUpdated: '2026-10-16T15:10:00.103'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-16650'
references:
  - url: 'https://wpscan.com/vulnerability/da611bd1-0702-4cdd-b04c-ad7210f78cfe/'
    label: contact@wpscan.com
tags:
  - nvd
epss: 0.00163
epssPercentile: 0.05409
ingestedAt: '2026-10-27T18:52:09.911Z'
---

## Overview

The Charitable WordPress plugin before 1.8.12 does not verify the authenticity of incoming Square payment webhook events in a default configuration, allowing unauthenticated attackers to forge webhook notifications that mark donations as paid without any real payment.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.