Unrestricted Upload of File with Dangerous Type
TYPO3 is an open source PHP based web content management system. In TYPO3 before versions 8.7.40, 9.5.25, 10.4.14, 11.1.1, due to the lack of ensuring file extensions belong to configured allowed mime-types, attackers can upload arbitrary data with arbitrary file extensions - however, default fileDenyPattern successfully blocked files like .htaccess or malicious.php. Besides that, UploadedFileReferenceConverter transforming uploaded files into proper FileReference domain model objects handles possible file uploads for other …