Executive brief
J2Store is a Joomla eCommerce extension that enables online sales through the Joomla content management system. A vulnerability in the Apps controller allows attackers to execute arbitrary code by reading and executing SQL files on the server without proper authorization checks. This could lead to data breach, data loss, or complete system compromise through database manipulation.
Technical details
The vulnerability exists in the `J2StoreControllerApps::appTask` delegation path, which instantiates app-plugin controllers without ACL authorization checks. The missing authorization is masked only by a side effect of `fof.xml`'s wildcard-deny rule that resolves under the singularized ACL key `app` (which has no explicit allow rule). Behind this delegation path, the `applocalizationdata::getInstallerTool()` method uses a caller-influenced table name parameter without an allowlist to both select `#__j2store_*` tables for truncation and construct a file path to load and execute SQL files. This combination enables path-traversal-capable file read and arbitrary SQL execution. The vulnerability affects J2Store versions 1.0.0–3.3.21, 4.0.0–4.0.21, and 4.1.0–4.1.6.
Affected products
- j2commerce.com J2Store 1.0.0–3.3.21, 4.0.0–4.0.21, 4.1.0–4.1.6
Timeline
- 2026-09-03: disclosed