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CVE-2021-26032

[20210501] - Core - Adding HTML to the executable block list of MediaHelper::canUpload

EPSS 1.0%
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.
Affected products
Joomla! Project · Joomla! CMS

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References
https://developer.joomla.org/security-centre/852-20210501-core-adding-html-to-the-executable-block-list-of-mediahelper-canupload.html