CVE-2026-65884 PUBLISHED

Joomla Extension - balbooa.com - Privilege Escalation in Gridbox < 2.20.2

Assigner: Joomla
Reserved: 23.07.2026 Published: 29.07.2026 Updated: 30.07.2026

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.

Metrics

CVSS 4.0

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:A/AU:Y/U:Red
CVSS Score: 10

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	High	Confidentiality	High
Attack Complexity	Low	Integrity	High	Integrity	High
Attack Requirements	None	Availability	High	Availability	High
Privileges Required	None
User Interaction	None

CVSS 4.0

Product Status

Vendor	balbooa.com
Product	Gridbox extension for Joomla
Versions	Default: unaffected Version 1.0.0-2.20.1 is affected

Credits

Phil Taylor finder
Pascal Lohmann finder

References

Problem Types

CWE-284 Improper Access Control CWE

Impacts

CAPEC-1 Accessing Functionality Not Properly Constrained by ACLs