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OpenAdvisories
High · 8.6 Public exploit CVE-2026-74252 EUVD-2026-64063GHSA-42m7-jqh7-g85c

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

Published Aug 21, 2026 · Updated Aug 21, 2026 · Assigned by Joomla

Vendor: j2commerce.com Product: J2Store extension for Joomla Category: Web / CMS

Description

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.

Affected products

VendorProductAffectedFixed
j2commerce.com J2Store extension for Joomla 1.0.0-3.3.20, 4.0.0-4.0.20, 4.1.0-4.1.5 —

Public exploits

Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.

Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.

GitHub 1 repository

Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.

References