CVE-2026-105607
Received Received - Intake

Unauthenticated Stored XSS in Gridbox Joomla Extension

Publication date: 2026-11-05

Last updated on: 2026-11-05

Assigner: Joomla! Project

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

CVSS Scores

EPSS Scores

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Meta Information

Published
2026-11-05
Last Modified
2026-11-05
Generated
2026-11-06
AI Q&A
2026-11-05
EPSS Evaluated
N/A
NVD
CVE-2026-105607
EUVD
EUVD-2026-117626

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
balbooa.com Gridbox extension for Joomla 1.0.0-2.20.4.2

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-79 The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

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Executive Summary

This is an unauthenticated stored cross-site scripting (XSS) vulnerability in the Recent Comments / Recent Reviews widget of the Gridbox Joomla extension versions before 2.20.5.0. It allows attackers to inject malicious scripts into web pages viewed by other users without authentication.

Impact Analysis

An attacker could exploit this to steal user sessions, deface websites, or deliver malware to visitors. Since it's stored XSS, the attack persists even after the page is reloaded. The high CVSS scores (8.6 v4.0, 8.3 v3.1) indicate significant risk of data breaches and system compromise.

Compliance Impact

This vulnerability could lead to unauthorized data access or modification, violating GDPR's integrity and confidentiality principles. For HIPAA-covered entities, it may compromise protected health information security requirements. Organizations using affected Gridbox versions should patch immediately to maintain compliance.

Mitigation Strategies

Update Gridbox to version 2.20.5.0 or later to patch the unauthenticated stored XSS vulnerability in the Recent Comments / Recent Reviews widget.

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