CVE-2026-78064

Joomla Extension - j2commerce.com - Anonymous cart-record tampering via inherited FOF `save` task in J2Store 1.0.0-3.3.21, 4.0.0-4.0.21, 4.1.0-4.1.6

Assigner: Joomla
Reserved: 22.08.2026 Published: 03.09.2026 Updated: 03.09.2026

Joomla Extension - j2commerce.com - Anonymous cart-record tampering via inherited FOF save task in J2Store 1.0.0-3.3.21, 4.0.0-4.0.21, 4.1.0-4.1.6 - fof.xml grants the carts view's tasks a wildcard true ACL, and FOF only enforces CSRF tokens on back-end HTML requests, not on front-end format=raw requests. J2StoreControllerCarts already scoped remove() to the caller's own session, but never overrode the generic FOF save task, so it remained reachable to insert new cart rows with an attacker-chosen user_id/session_id, or overwrite an existing row by id.

Metrics

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N
CVSS Score: 8.8

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	Low	Confidentiality	None
Attack Complexity	Low	Integrity	High	Integrity	None
Attack Requirements	None	Availability	None	Availability	None
Privileges Required	None
User Interaction	None

CVSS 4.0

Product Status

Vendor	j2commerce.com
Product	J2Store extension for Joomla
Versions	Default: unaffected Version 1.0.0-3.3.21 is affected Version 4.0.0-4.0.21 is affected Version 4.1.0-4.1.6 is affected

Vendor

j2commerce.com

Product

J2Store extension for Joomla

Versions

Default: unaffected

Version 1.0.0-3.3.21 is affected
Version 4.0.0-4.0.21 is affected
Version 4.1.0-4.1.6 is affected

Credits

Phil Taylor, mysites.guru finder

References

Problem Types