The File Abstraction Layer (FAL) in TYPO3 6.0.x before 6.0.9 and 6.1.x before 6.1.4 does not properly check permissions, which allows remote authenticated users to create or read arbitrary files via a crafted URL.
https://github.com/advisories/GHSA-p9jg-9w87-6rg4
https://typo3.org/teams/security/security-bulletins/typo3-core/typo3-core-sa-2013-003/