• Project: Joomla!
• SubProject: CMS
• Impact: Low
• Severity: Low
• Versions: 3.0.0 - 3.9.26
• Exploit type: XSS
• Reported Date: 2021-03-05
• Fixed Date: 2021-05-25
• CVE Number: CVE-2021-26032

Description

HTML was missing in the executable block list of MediaHelper::canUpload, leading to XSS attack vectors.

Affected Installs

Joomla! CMS versions 3.0.0 - 3.9.26

Solution

Upgrade to version 3.9.27

Contact

The JSST at the Joomla! Security Centre.