CVE-2026-39428: Cubecart v6

Medium severity, CVSS 4.8. EPSS: 0.2% chance of exploitation in the next 30 days.

CubeCart is an ecommerce software solution. Prior to 6.6.0, a Stored Cross-Site Scripting (XSS) vulnerability exists in CubeCart v6.x. An attacker with administrative privileges can inject malicious JavaScript payloads into multiple fields during the creation or modification of a product. These payloads are stored in the database and executed whenever a user (customer or another administrator) views the affected product pages, which could lead to session hijacking or unauthorized actions. This vulnerability is fixed in 6.6.0.

Affected products

• Cubecart v6: before 6.6.0 (fixed in 6.6.0)

Published 2026-05-13. Last modified 2026-06-17.