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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 - 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.

    Published:Aug 21, 2026
    Last Modified:Aug 21, 2026
    EPS:Aug 21, 2026
    EPSS Score:
    CVSS Score:8.6

    Affected Products

    Vendor
    J2commerce.com
    Product
    J2store Extension For Joomla

    Exploits

    https://github.com/toanln-cov/CVE-2026-74252

    Related CVEs

    CVE-2026-78000 (CVSS 5.3) — Joomla Extension - j2commerce.com - Reflected XSS via `filter_tag`, `pricefrom` and `priceto` in J2Store 1.0.0…
    CVE-2026-78069 (CVSS 9.5) — Joomla Extension - j2commerce.com - Missing authorization on Apps controller delegation chain in J2Store 1.0.0…
    CVE-2026-78065 (CVSS 7.1) — Joomla Extension - j2commerce.com - Guest checkout address disclosure to any authenticated user (IDOR) in J2St…
    CVE-2026-77999 (CVSS 8.7) — Joomla Extension - j2commerce.com - Unauthenticated PayPal callback forgery leading to order confirmation frau…
    CVE-2026-78064 (CVSS 8.8) — Joomla Extension - j2commerce.com - Anonymous cart-record tampering via inherited FOF `save` task in J2Store 1…
    CVE-2026-67361 (CVSS 6.9) — Joomla Extension - j2commerce.com - Unauthenticated file upload with missing directory protection in J2Store 1…
    CVE-2026-67358 (CVSS 5.3) — Joomla Extension - j2commerce.com - Download quota manipulation in J2Store 1.0.0-3.3.20, 4.0.0-4.0.20, 4.1.0-4…
    CVE-2026-67362 (CVSS 5.1) — Joomla Extension - j2commerce.com - Open redirect in cart controller in J2Store 1.0.0-3.3.20, 4.0.0-4.0.20, 4.…
    CVE-2026-67359 (CVSS 8.7) — Joomla Extension - j2commerce.com - Order content disclosure J2Store 1.0.0-3.3.20, 4.0.0-4.0.20, 4.1.0-4.1.5 -…
    CVE-2026-67360 (CVSS 6.3) — Joomla Extension - j2commerce.com - Cross-customer order replication in J2Store 1.0.0-3.3.20, 4.0.0-4.0.20, 4.…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High