CVE-2026-78000 Details
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.
A reflected cross-site scripting vulnerability has been identified in the Joomla extension J2Store, specifically in versions 1.0.0 through 3.3.21, 4.0.0 through 4.0.21, and 4.1.0 through 4.1.6. The issue arises in four task handlers that accept base64-encoded URLs from user input and redirect to them without validating the destination host. This flaw enables phishing attacks by exploiting the shop's trusted domain. The vulnerability does not require authentication.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Sep 3, 2026CISA-ADP
Assessed Sep 3, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://www.j2commerce.com/ | [email protected] | Vendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-79 | Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| J2Commerce J2Store | >= 1.0.0, <= 3.3.21 (semver) >= 4.0.0, <= 4.0.21 (semver) >= 4.1.0, <= 4.1.6 (semver) |
CPE
Remediation
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Sep 3, 2026 | CVE Modified | CISA-ADP |
| Sep 3, 2026 | New CVE Received | [email protected] |