CVE-2026-65885

CRITICAL CVSS 4.0: 9.4 EPSS 0.29%
Updated Aug 05, 2026
Joomla
Parameter Value
CVSS 9.4 (CRITICAL)
Affected Versions before 2.20.2
Fixed In 2.20.2
Type CWE-434 (Unrestricted File Upload)
Vendor Joomla
Public PoC No

Joomla Extension - balbooa.com - Authenticated arbitrary file upload in Gridbox < 2.20.2 - File upload methods allows authenticated attackers to upload arbitrary files. Turns into an authenticated RCE if combined with CVE-2026-65884 as the required account can be created by the attacker.

Attack Parameters

Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
High
Admin privileges needed
User Interaction
None
No user interaction needed

Impact Assessment

Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
High
Complete denial of service

CVSS Vector v4.0

Vulnerable Products 1

Configuration From (including) Up to (excluding)
Balbooa Gridbox
cpe:2.3:a:balbooa:gridbox:*:*:*:*:*:joomla\!:*:*
2.20.2