Accept Stripe Payments < 2.0.40 - Authenticated Stored Cross-Site Scripting

2021-01-05 00:00
Park Won Seok

Strategic Overview

Status
Patched in 2.0.40
Affected Plugin
Accept Stripe Payments
Affected Version
< 2.0.40
CVSS
6.4Medium
Weakness type
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE
CVE pending
View all Accept Stripe Payments vulnerabilities

At a glance

This record tracks a medium-severity Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in the Accept Stripe Payments WordPress plugin, affecting versions < 2.0.40. It carries a CVSS score of 6.4 (reachable over the network; low attack complexity). Exploitation requires an authenticated account. The issue is fixed in version 2.0.40; sites on affected versions should update now. Disclosed January 2021, reported by Park Won Seok.

Vulnerability Overview

The Accept Stripe Payments plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the ‘currency_code’ parameter in versions up to, and including, 2.0.39 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

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 interaction from a victim user.

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Accept Stripe Payments < 2.0.40 carries this weakness at currency_code, and reaching it takes any authenticated account. Cross-site scripting happens when input from a request is written into a page without being escaped for the context it lands in, so the browser parses attacker-supplied text as markup or script.

Injected script runs with the privileges of whoever views the affected page, which is how these flaws turn into administrator session theft, silent account creation or persistent backdoors in page content. For Accept Stripe Payments the fix is 2.0.40: builds < 2.0.40 are affected, anything from 2.0.40 onward is not.

Remediation

Update to version 2.0.40, or a newer patched version

How does WordSec protect against this?

The attempt arrives as an ordinary request to Accept Stripe Payments: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Accept Stripe Payments 2.0.40 closes this, and updating the plugin is the step that ends it.

  • Firewall
  • Alerts

External References

https://www.wordfence.com/threat-intel/vulnerabilities/id/edecb27b-ff11-4186-b8a8-41a85e3e2023

Related records

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