The Content Editing Wizards component in TYPO3 4.5.0 through 4.5.31, 4.7.0 through 4.7.16, 6.0.0 through 6.0.11, and 6.1.0 through 6.1.6 allows remote authenticated backend users to unserialize arbitrary PHP objects, delete arbitrary files, and possibly have other unspecified impacts via an unspecified parameter, related to a "missing signature."
https://github.com/advisories/GHSA-47ww-mq32-g4xw
http://www.debian.org/security/2014/dsa-2834
http://typo3.org/teams/security/security-bulletins/typo3-core/typo3-core-sa-2013-004/