PatchTheCVECVE-2026-65885: Joomla Extension - balbooa.com - Authenticated arbitrary file upload in Gridbox < 2.20.2 - File upload methods
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HIGH 8.8UPGRADE
CVE-2026-65885 is a high-severity flaw (CVSS 8.8) affecting gridbox. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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.
Why this priority
- High severity
A fixed release or distro patch exists.
Risk facts
| CVSS score | 8.8 (High) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | Low |
| User interaction | None |
| EPSS exploit chance | 0.5% (top 57%) |
| CISA exploited list | No |
| Weakness | CWE-434 |
| Published | 2026-07-29 |
| Last modified | 2026-10-23 |
Publisher (CNA): Joomla! Project · Vendor: balbooa
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
balbooa gridbox UPGRADE
Affected: < 2.20.2
Fixed in: 2.20.2
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy gridbox || rpm -q gridbox || gridbox --version
2. UPGRADE to 2.20.2 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade gridbox
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade gridbox
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
Exact fixes by distribution
Fedora 46 · kwin-zones · FIXED · 1.0.13-1.fc46 · FEDORA-2026-95888f332b · source
sudo dnf upgrade --advisory=FEDORA-2026-95888f332b
Fedora ELN · nginx-mod-brotli · FIXED · 1.0.0~rc-16.eln159 · FEDORA-2026-501a6a8273 · source
sudo dnf upgrade --advisory=FEDORA-2026-501a6a8273
Public exploits and detection
Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.
Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Related CVEs
- CVE-2026-65884 CRITICAL 9.8 UPGRADE Joomla Extension - balbooa.com - Privilege Escalation in Gridbox < 2.20.2 - The registration method allows use
- CVE-2026-65887 CRITICAL 9.8 UPGRADE Joomla Extension - balbooa.com - Unauthenticated arbitrary password reset in Gridbox < 2.20.2 - The resetPassw
- CVE-2026-65888 CRITICAL 9.8 UPGRADE Joomla Extension - balbooa.com - Account takeover vulnerability in Gridbox < 2.20.2 - The socialLogin method a
- CVE-2026-65890 CRITICAL 9.8 UPGRADE Joomla Extension - balbooa.com - Unauthenticated SQL injection in Gridbox < 2.20.2 - Multiple SQLi vectors all
- CVE-2026-65886 HIGH 7.5 UPGRADE Joomla Extension - balbooa.com - Unauthenticated arbitrary file read in Gridbox < 2.20.2 - The photo viewer al