CVE-2026-78000 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
Attackers can redirect users to malicious sites via unvalidated base64 URLs in J2Store, enabling phishing attacks without authentication.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-78000?
CVE-2026-78000 is a medium-severity vulnerability in j2commerce.com J2Store extension for Joomla, published on 3 Sep 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
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.
Weakness: CWE-79
Which versions are affected by CVE-2026-78000?
How do I fix CVE-2026-78000?
No fix has been published for CVE-2026-78000 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-78000 being exploited?
There is no known exploitation of CVE-2026-78000 in the wild and no public exploit code.
Sources
Also known as GHSA-3p2h-qrvh-pqvm.