J2Commerce J2Store Extension 1.0.0-3.3.20/4.0.0-4.0.20/4.1.0-4.1.5 Guest checkout Input::getArray cross site scripting

Summaryinfo

A vulnerability classified as problematic was found in J2Commerce J2Store Extension 1.0.0-3.3.20/4.0.0-4.0.20/4.1.0-4.1.5. Affected is the function Input::getArray of the component Guest checkout. Such manipulation leads to cross site scripting. This vulnerability is traded as CVE-2026-74252. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in J2Commerce J2Store Extension 1.0.0-3.3.20/4.0.0-4.0.20/4.1.0-4.1.5. Affected by this issue is the function Input::getArray of the component Guest checkout. The manipulation with an unknown input leads to a cross site scripting vulnerability. Using CWE to declare the problem leads to CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. Impacted is integrity. CVE summarizes:

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.

The advisory is shared for download at j2commerce.com. This vulnerability is handled as CVE-2026-74252 since 08/15/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1059.007.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Vendor

• J2Commerce

Name

• J2Store Extension

Version

• 1.0.0-3.3.20
• 4.0.0-4.0.20
• 4.1.0-4.1.5

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