CVE-2026-78069
Received Received - Intake

Missing Authorization in J2Store Extension for Joomla

Publication date: 2026-09-03

Last updated on: 2026-09-03

Assigner: Joomla! Project

Description
Joomla Extension - j2commerce.com - Missing authorization on Apps controller delegation chain in J2Store 1.0.0-3.3.21, 4.0.0-4.0.21, 4.1.0-4.1.6 - `J2StoreControllerApps`'s `appTask` delegation path instantiates app-plugin controllers with no ACL check anywhere in the code. It currently returns 403 only as a side effect of `fof.xml`'s wildcard-deny resolving under the singularised ACL key `app`, which has no explicit allow rule — not because of any deliberate check. Behind that path, `applocalizationdata::getInstallerTool()` used a caller-influenced table name with no allow-list, both to select a `#__j2store_*` table for truncation and to build a path to SQL files it then executes — a path-traversal-capable file read/execute.

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Meta Information

Published
2026-09-03
Last Modified
2026-09-03
Generated
2026-09-03
AI Q&A
2026-09-03
EPSS Evaluated
N/A
NVD
CVE-2026-78069
EUVD
EUVD-2026-70445

Affected Vendors & Products

Showing 3 associated CPEs
Vendor Product Version / Range
j2commerce j2store From 1.0.0 (inc) to 3.3.21 (inc)
j2commerce j2store From 4.0.0 (inc) to 4.0.21 (inc)
j2commerce j2store From 4.1.0 (inc) to 4.1.6 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-862 The product does not perform an authorization check when an actor attempts to access a resource or perform an action.

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Executive Summary

This vulnerability exists in J2Store Joomla extension versions 1.0.0-3.3.21, 4.0.0-4.0.21, and 4.1.0-4.1.6. It allows unauthorized access through a missing authorization check in the Apps controller delegation chain. Specifically, the J2StoreControllerApps appTask path creates app-plugin controllers without proper access control list (ACL) validation. The system only returns a 403 error due to a side effect of wildcard-deny rules in fof.xml rather than explicit security checks.

Impact Analysis

An attacker could exploit this to perform unauthorized actions such as truncating database tables or executing arbitrary SQL files through path traversal. This could lead to data loss, unauthorized data access, or complete system compromise depending on the attacker's goals and the permissions of the Joomla installation.

Compliance Impact

This vulnerability could lead to unauthorized data access or deletion, violating GDPR's data integrity and confidentiality requirements and HIPAA's security rule for protected health information. Organizations using affected J2Store versions may face compliance violations, potential fines, and reputational damage if exploited.

Mitigation Strategies

Update J2Store to the latest patched version immediately to address the missing authorization and path traversal issues. Disable or remove the vulnerable Apps controller delegation chain if updates are not immediately available. Review and restrict database table access permissions to prevent unauthorized truncation or SQL file execution.

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