CVE-2026-78000 PUBLISHED

Joomla Extension - j2commerce.com - Open redirect in cart controller in J2Store 1.0.0-3.3.20, 4.0.0-4.0.20, 4.1.0-4.1.5

Assigner: Joomla
Reserved: 21.08.2026 Published: 03.09.2026 Updated: 03.09.2026

Joomla Extension - j2commerce.com - Reflected XSS via filter_tag, pricefrom and priceto in J2Store 1.0.0-3.3.21, 4.0.0-4.0.21, 4.1.0-4.1.6 - Four task handlers accepted a base64-encoded URL from user input and redirected to it without validating the destination host, enabling phishing using the shop's trusted domain. No authentication required.

Metrics

CVSS 4.0

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
CVSS Score: 5.3

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

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

Credits

Phil Taylor, mysites.guru finder

References

https://www.j2commerce.com/

Problem Types

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') CWE