Paper/Archive/CVE-2026-65885

CVE-2026-65885

balbooa.com Gridbox extension for Joomla — Joomla Extension - balbooa.com - Authenticated arbitrary file upload in Gridbox < 2.20.2

EPSS 0.5%CVSS 9.4

critical.is priorityof 100

CVSS 9.4 (CNA)9.4 / 10 × 3028.2 Not in CISA KEV+300.0 EPSS percentile 44.3.443 × 208.9 No public exploit+100.0 SSVC exploitation: none+100.0

Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource

Gridbox extension for Joomla1.0.0-2.20.1–CNA

Scores by source

Joomla (CNA)9.4CVSS: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/AU:Y/U:Red

CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: total

References

refbalbooa.com/gridbox writeupmysites.guru/blog/gridbox-23-critical-vulnerabilities