CVE-2026-65884: Balbooa Gridbox

Critical severity, CVSS 9.8. EPSS: 0.5% chance of exploitation in the next 30 days.

Joomla Extension - balbooa.com - Privilege Escalation in Gridbox < 2.20.2 - The registration method allows users provided usergroup IDs, allowing unauthenticated actors to register new accounts with administrative permissions.

Affected products

• Balbooa Gridbox: before 2.20.2 (fixed in 2.20.2)

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