CVE-2026-65884

CRITICAL EXPLOITED

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

Title source: cna
STIX 2.1

Exploitation Summary

CVE-2026-65884 has been observed exploited in the wild (reported by VulnCheck KEV).

Description

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.

References (2)

Core 2
Core References
Third Party Advisory third-party-advisory
https://mysites.guru/blog/gridbox-23-critical-vulnerabilities/

Scores

CVSS v4 10.0
EPSS 0.0025
EPSS Percentile 16.3%
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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:Y/R:X/V:X/RE:X/U:Red

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact total

Details

VulnCheck KEV 2026-07-29
CWE
CWE-284
Status published
Products (1)
balbooa.com/Gridbox extension for Joomla 1.0.0-2.20.1
Published Jul 29, 2026
Tracked Since Jul 29, 2026