---
id: CVE-2026-74252
title: >-
  Joomla Extension - j2commerce.com - Stored XSS in Guest checkout in J2Store
  1.0.0-3.3.20, 4.0.0-4.0.20, 4.1.0-4.1.5 - J2Commerce 4.1.5 is vulnerable to
  Stored Cross-Site Scripting (XSS) through the guest checkout billing address
  fields
summary: >-
  Joomla Extension - j2commerce.com - Stored XSS in Guest checkout in J2Store
  1.0.0-3.3.20, 4.0.0-4.0.20, 4.1.0-4.1.5 - J2Commerce 4.1.5 is vulnerable to
  Stored Cross-Site Scripting (XSS) through the guest checkout billing address
  fields. …
severity: none
cwe:
  - CWE-79
published: '2026-08-21'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T19:10:00.297'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-74252'
references:
  - url: 'https://www.j2commerce.com/'
    label: security@joomla.org
tags:
  - nvd
  - exploit-available
epss: 0.00519
epssPercentile: 0.42706
exploits:
  github: 1
  githubRepos:
    - 'https://github.com/toanln-cov/CVE-2026-74252'
  checkedAt: '2026-10-14T19:50:33.272Z'
exploitAvailable: true
ingestedAt: '2026-10-14T19:49:57.570Z'
---

## Overview

Joomla Extension - j2commerce.com - Stored XSS in Guest checkout in J2Store 1.0.0-3.3.20, 4.0.0-4.0.20, 4.1.0-4.1.5 - J2Commerce 4.1.5 is vulnerable to Stored Cross-Site Scripting (XSS) through the guest checkout billing address fields. An unauthenticated attacker exploits a filter bypass in Joomla's Input::getArray() combined with PHP's variables_order=EGPCS (Cookie overrides POST in $_REQUEST ) to store unsanitized HTML in fields such as billing_first_name.

## Remediation

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