Medium severity · published Jul 29, 2026
CVE-2026-66489
Joomla Extension - balbooa.com - Various unauthenticated file system disclosure in Gridbox < 2.20.2
5.3
CVSS
0.3%
EPSS
No
On KEV
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 28% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
GE
Gridbox extension for Joomla · balbooa.com
1.0.0-2.20.1 · source: vendor
GR
Gridbox · Balbooa
before 2.20.2 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-66489
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-66489
Third Party Advisory
https://mysites.guru/blog/gridbox-23-critical-vulnerabilities/
Product
https://www.balbooa.com/gridbox
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