[20260515] - Core - Incorrect Access Control in sample data plugins

Project: Joomla!
SubProject: CMS
Impact: High
Severity: Moderate
Probability: Moderate
Versions: 4.0.0-5.4.5,6.0.0-6.1.0
Exploit type: Incorrect Access Control
Reported Date: 2026-04-23
Fixed Date: 2026-05-26
CVE Number: CVE-2026-48899

Description

An improper access check allow unauthorized users to perform actions related to the installation of sampledata.

Affected Installs

Joomla! CMS versions 4.0.0-5.4.5,6.0.0-6.1.0

Solution

Upgrade to version 5.4.6,6.1.1

Contact

The JSST at the Joomla! Security Centre.

Reported By: 廖双, JSST