---
id: "CVE-2026-105607"
kind: "vulnerability"
aliases: ["CVE-2026-105607"]
title: "Joomla Gridbox extension: unauthenticated stored XSS via Recent Comments widget"
severity: "high"
cvss: 8.6
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["gridbox", "joomla", "package", "self-hosted", "wordpress-alternative"]
not_affected_if: ["gridbox-not-installed", "version-2.20.5.0-or-later", "widget-not-used"]
published_at: "2026-11-05T18:16:59+00:00"
first_seen_at: "2026-11-05T18:40:09+00:00"
updated_at: "2026-11-05T18:40:24+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-105607", "first_seen_at": "2026-11-05T18:40:09+00:00"}]
exploit_sources: []
---

# Joomla Gridbox extension: unauthenticated stored XSS via Recent Comments widget

The Gridbox extension for Joomla has a stored cross-site scripting flaw in its Recent Comments / Recent Reviews widget. An unauthenticated visitor can plant script that runs in other users' browsers when the widget renders.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the installed Gridbox extension version in the Joomla administrator under Extensions > Manage, comparing against `2.20.5.0`

## Fix

- Gridbox: move to `2.20.5.0` or later

## Timeline

- 2026-11-05T18:40:09+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-105607

## From the sources

Joomla Extension - balbooa.com - Unauthenticated stored XSS in the "Recent Comments / Recent Reviews" widget in Gridbox < 2.20.5.0

---

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