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9.5
CVE-2026-78069: J2Store Joomla extension can let attackers run code
CVE-2026-78069 · published today
Summary
Versions of the J2Store extension for Joomla (up to 4.1.6) do not properly check who can use the Apps functions. Because of this, a remote user could cause the system to read or execute files it should not, potentially taking control of the site. Update to the latest patched version or apply the vendor’s recommended configuration changes and restrict access to the Apps controller.
What to do
The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.
Affected software
| Vendor | Product | Affected versions |
|---|---|---|
| j2commerce.com | j2store extension for joomla | 1.0.0-3.3.21 |
Original advisory text
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 pat...
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.
References
Severity
9.5
Critical
CVSS 4.0: 9.5 (NVD)
Type
CWE-862Missing Authorization
Timeline
Published3 Sep 2026
Updated3 Sep 2026
First seen3 Sep 2026
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