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CVE-2026-74252— 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

Quick assessment

Affected
j2commerce.com J2Store extension for Joomla
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Joomla 扩展 - j2commerce.com - J2Store 1.0.0-3.3.20、4.0.0-4.0.20、4.1.0-4.1.5 中访客结账时存在存储型跨站脚本漏洞（Stored XSS）- J2Commerce 4.1.5 在访客结账的账单地址字段中易受存储型跨站脚本攻击（XSS）影响。未授权的攻击者通过利用 Joomla 的 Input::getArray() 中的过滤器绕过机制，并结合 PHP 的 variables_order=EGPCS 配置（其中 Cookie 会覆盖 $_REQUE

CVSS 8.6 · High EPSS 0.34% · P27

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 3

VendorProduct Version RangeStatus
j2commerce.com J2Store extension for Joomla 1.0.0-3.3.20 affected
4.0.0-4.0.20 affected
4.1.0-4.1.5 affected
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I. Basic Information for CVE-2026-74252

Vulnerability Information
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Vulnerability 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
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
j2commerce.com J2Store extension for Joomla 1.0.0-3.3.20 -

II. Public POCs for CVE-2026-74252

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III. Intelligence Information for CVE-2026-74252

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Vendor Pages for CVE-2026-74252 (1)

Same Patch Batch · j2commerce.com · 2026-08-21 · 6 CVEs total

CVE-2026-67359 8.7 HIGH Joomla Extension - j2commerce.com - Order content disclosure J2Store 1.0.0-3.3.20, 4.0.0-4
CVE-2026-67361 6.9 MEDIUM Joomla Extension - j2commerce.com - Unauthenticated file upload with missing directory pro
CVE-2026-67360 6.3 MEDIUM Joomla Extension - j2commerce.com - Cross-customer order replication in J2Store 1.0.0-3.3.
CVE-2026-67358 5.3 MEDIUM Joomla Extension - j2commerce.com - Download quota manipulation in J2Store 1.0.0-3.3.20, 4
CVE-2026-67362 5.1 MEDIUM Joomla Extension - j2commerce.com - Open redirect in cart controller in J2Store 1.0.0-3.3.

IV. Related Vulnerabilities

Same product: J2Store extension for Joomla
Same vendor: j2commerce.com
Same weakness: CWE-79

V. Comments for CVE-2026-74252

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