CVE-2026-78065 Missing authorization in J2Store extension for Joomla
Authenticated users can view guest checkout addresses by guessing sequential IDs due to missing authorization checks in J2Store.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-78065?
CVE-2026-78065 is a high-severity missing authorization vulnerability in j2commerce.com J2Store extension for Joomla, published on 3 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Joomla Extension - j2commerce.com - Guest checkout address disclosure to any authenticated user (IDOR) in J2Store 1.0.0-3.3.21, 4.0.0-4.0.21, 4.1.0-4.1.6 - `editAddress()` redirected non-owners away only when the loaded address row had a **non-empty** `user_id` belonging to someone else. Guest-checkout address rows have an empty `user_id`, so that check never triggered for them — any logged-in account guessing a small, sequential `address_id` got a guest customer's full name, street address, and phone number rendered prefilled into the edit form.
Weakness: CWE-639
Which versions are affected by CVE-2026-78065?
How do I fix CVE-2026-78065?
No fix has been published for CVE-2026-78065 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-78065 being exploited?
There is no known exploitation of CVE-2026-78065 in the wild and no public exploit code.
Sources
Also known as GHSA-vwvh-r394-jv9x.