---
id: CVE-2026-107903
title: >-
  Joomla Extension - balbooa.com - Stored XSS in reviews via inconsistent
  sanitization in Gridbox < 2.20.5.0
summary: >-
  Joomla Extension - balbooa.com - Stored XSS in reviews via inconsistent
  sanitization in Gridbox < 2.20.5.0
severity: high
cvss: 8.6
cvssVector: 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N'
cvssSource: cna
cwe:
  - CWE-79
vendor: balbooa.com
product: com_gridbox
affected:
  - com_gridbox 1.0.0-2.20.4.2
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-11-05T19:22:22.380916Z'
published: '2026-11-05'
updated: '2026-11-06'
sourceUpdated: '2026-11-06T04:39:53.108Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-107903'
references:
  - url: 'https://www.balbooa.com/gridbox'
tags:
  - cve.org
ingestedAt: '2026-11-05T22:38:31.530Z'
---

## Overview

Joomla Extension - balbooa.com - Stored XSS in reviews via inconsistent sanitization in Gridbox < 2.20.5.0

## Affected

- `com_gridbox 1.0.0-2.20.4.2`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.