It has been discovered, that editors with access to the file list module could list all files names and folder names in the root directory of a TYPO3 installation. Modification of files, listing further nested directories or retrieving file contents was not possible. A valid backend user account is needed to exploit this vulnerability.

References

• TYPO3/typo3@d9caccb
• https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms/2015-07-01-4.yaml
• https://typo3.org/security/advisory/typo3-core-sa-2015-005
• https://typo3.org/teams/security/security-bulletins/typo3-core/typo3-core-sa-2015-005