---
id: CVE-2026-83537
title: >-
  The WP Express Checkout WordPress plugin before 2.5.0 does not verify
  server-side that a payment was actually completed before marking an order as
  paid, allowing unauthenticated users to forge a completed order without
  paying.
summary: >-
  The WP Express Checkout WordPress plugin before 2.5.0 does not verify
  server-side that a payment was actually completed before marking an order as
  paid, allowing unauthenticated users to forge a completed order without
  paying.
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
product: WP Express Checkout
affected:
  - wp_express_checkout < 2.5.0
published: '2026-09-09'
updated: '2026-09-09'
sourceUpdated: '2026-09-09T16:17:12.130'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-83537'
references:
  - url: 'https://wpscan.com/vulnerability/02b39e4f-181d-4573-9175-bf5a6d71e531/'
    label: contact@wpscan.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-09-09T15:22:16.966066Z'
epss: 0.00163
epssPercentile: 0.04805
ingestedAt: '2026-09-09T07:03:03.596Z'
---

## Overview

The WP Express Checkout WordPress plugin before 2.5.0 does not verify server-side that a payment was actually completed before marking an order as paid, allowing unauthenticated users to forge a completed order without paying.

## Remediation

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