Describe CVE-2013-4321.
What is CVE-2013-4321?
The File Abstraction Layer (FAL) in TYPO3 6.0.x before 6.0.8 and 6.1.x before 6.1.4 allows remote authenticated editors to execute arbitrary PHP code via unspecified characters in the file extension when renaming a file.  NOTE: this vulnerability exists because of an incomplete fix for CVE-2013-4250..