CVE-2026-107903
Received Received - Intake

Stored XSS in Balbooa Gridbox Joomla Extension

Publication date: 2026-11-05

Last updated on: 2026-11-05

Assigner: Joomla! Project

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

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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-2026-107903
EUVD
EUVD-2026-117627

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 a stored cross-site scripting (XSS) vulnerability in the Gridbox Joomla extension by balbooa.com. It exists due to inconsistent sanitization of user input in reviews, allowing malicious scripts to be stored on the server and executed when other users view the page.

Impact Analysis

An attacker could inject malicious scripts into reviews that execute when other users access the page. This could lead to theft of session cookies, account takeover, or defacement of the website. Users with admin privileges are particularly at risk if they view compromised reviews.

Compliance Impact

This vulnerability could lead to unauthorized access to user data, violating GDPR's data protection requirements. For HIPAA, it may compromise protected health information if user reviews contain sensitive data. Both regulations require protection against unauthorized data access.

Mitigation Strategies

Update Gridbox extension for Joomla to version 2.20.5.0 or later to address the stored XSS vulnerability.

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