🛡️ CVE-2026-65885 — gridbox

🟠 CVSS 8.8 — High ✅ No Known Exploit CWE-434 NVD
8.8
CVSS Score
0 Low4 Medium7 High9 Critical10

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.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity high, availability high.

Weakness class

CVE-2026-65885 is classified as CWE-434: Unrestricted Upload of File with Dangerous Type. Uploads are accepted without restricting type, so an executable file can be placed where the server will run it.

Affected software

CVE-2026-65885 is recorded against 1 package.

  • gridbox (fixed in 2.20.2)

Timeline and source

Published on 29 July 2026 and last revised on 5 August 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

mysites.guru
www.balbooa.com

Details

Severity HIGH
CVSS Score 8.8
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE CWE-434
Public Exploit ✅ No
Source NVD
Published 2026-07-29
Updated 2026-08-11
Modified 2026-08-05
Fix URL N/A

Affected Packages

Software From version Fixed in
gridbox — 2.20.2

Similar Threats

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