WooCommerce Payments <= 4.5.0 - Payment Bypass

2022-08-09 00:00

Strategic Overview

Status: Patched in 3.9.4
Affected Plugin: WooPayments: Integrated WooCommerce Payments
Affected Version: 3.9.0 – 4.5.0 · 7 branches
CVSS: 5.3Medium
Weakness type: CWE-233 · Improper Handling of Parameters
CVE: CVE pending

View all WooPayments: Integrated WooCommerce Payments vulnerabilities

At a glance

This record tracks a medium-severity Improper Handling of Parameters vulnerability in the WooPayments WordPress plugin, affecting versions 3.9.0 – 4.5.0 · 7 branches. It carries a CVSS score of 5.3 (reachable over the network; low attack complexity). Exploitation requires no authentication. The issue is fixed in version 3.9.4; sites on affected versions should update now. Disclosed August 2022.

Vulnerability Overview

The WooCommerce Payments plugin for WordPress is vulnerable to payment bypass in versions up to, and including, 4.5.0. This is due to insufficient controls on checkout payment intent. This makes it possible for unauthenticated users to complete purchases without paying for them.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no privileges on the target site, and no interaction from a victim user.

CWE-233: Improper Handling of Parameters

The product does not properly handle when the expected number of parameters, fields, or arguments is not provided in input, or if those parameters are undefined.

Remediation

Update to one of the following versions, or a newer patched version: 3.9.4, 4.0.3, 4.1.1, 4.2.2, 4.3.1, 4.4.1, 4.5.1

How does WordSec protect against this?

The fix is the thing that ends this: WooPayments 3.9.4 closes this, and updating the plugin is the step that ends it.

Alerts

External References

https://www.wordfence.com/threat-intel/vulnerabilities/id/9d604200-91b0-4885-8fe2-1323b9d6fed5

Related records

Other vulnerabilities in WooPayments: Integrated WooCommerce Payments

CVSS Vector

5.3

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged
ConfidentialityNone
IntegrityLow
AvailabilityNone

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