What is CVE-2026-65885?

CVE-2026-65885 is a high-severity vulnerability in Balbooa Gridbox, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 8.8/10. Published 2026-07-29.

How severe is CVE-2026-65885?

High severity. CVSS v3 base score is 8.8 out of 10.

Arbitrary file upload in Balbooa Gridbox

CVE-2026-65885

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.

Vulnerability class: Unrestricted File Upload

EPSS: 0.003 (21.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Balbooa Gridbox
Balbooa.com Gridbox Extension For Joomla — versions 1.0.0-2.20.1

Weakness classification (CWE)

CWE-434 — Unrestricted Upload of File with Dangerous Type

References

security@joomla.org (Product, product)
security@joomla.org (Third Party Advisory, third-party-advisory)

Frequently asked questions

What is CVE-2026-65885?: CVE-2026-65885 is a high-severity vulnerability in Balbooa Gridbox, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 8.8/10. Published 2026-07-29.
How severe is CVE-2026-65885?: High severity. CVSS v3 base score is 8.8 out of 10.