CVE-2026-66490: Balbooa Gridbox

Medium severity, CVSS 6.1. EPSS: 0.3% chance of exploitation in the next 30 days.

Joomla Extension - balbooa.com - Stored cross-site scripting via a comment avatar in Gridbox < 2.20.2

Affected products

• Balbooa Gridbox: before 2.20.2 (fixed in 2.20.2)

Published 2026-07-29. Last modified 2026-08-05.