CVE-2026-65885
CRITICAL EXPLOITEDJoomla Extension - balbooa.com - Authenticated arbitrary file upload in Gridbox < 2.20.2
Title source: cnaExploitation Summary
CVE-2026-65885 has been observed exploited in the wild (reported by VulnCheck KEV).
Description
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.
References (2)
Core 2
Core References
Product product
https://www.balbooa.com/gridbox
Third Party Advisory third-party-advisory
https://mysites.guru/blog/gridbox-23-critical-vulnerabilities/
Scores
CVSS v4
9.4
EPSS
0.0025
EPSS Percentile
16.6%
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/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
no
Technical Impact
total
Details
VulnCheck KEV
2026-07-29
CWE
CWE-434
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