CVE-2026-65884CWE-284broken-access-control

CVE-2026-65884

Critical · published July 29, 2026

CVSS v3.1

9.8

EPSS

Percentile

43.2

In the wild

Unconfirmed

What it is

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.

The record

Technical detail

CVSS v3.1: 9.8 · CRITICAL
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0: Not supplied
EPSS: 0.00517 · 43.2th percentile
Weakness: CWE-284 · Improper Access Control
Published: 2026-07-29T17:19Z

Affected products (1)

Product	Versions	Fixed in
balbooa/gridbox	< 2.20.2	2.20.2

References (2)

https://mysites.guru/blog/gridbox-23-critical-vulnerabilities/ · [email protected]https://www.balbooa.com/gridbox · [email protected]

EPSS history

Timeline

29 JUL 12:09Z
Joomla Extension - balbooa.com - Privilege Escalation in Gridbox < 2.20.2
cvelistv5