CVE-2026-78000 – Joomla Extension – j2commerce.com – Reflected XSS via `filter_tag`, `pricefrom` and `price

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.