An issue was discovered in Joomla! 3.0.0 through 3.9.26. HTML was missing in the executable block list of MediaHelper::canUpload, leading to XSS attack vectors.
{
    "severity": "Medium",
    "cpes": [
        "cpe:2.3:a:joomla:joomla!:*:*:*:*:*:*:*:*"
    ]
}