function/update_xml.php in FLABER 1.1 and earlier allows remote attackers to overwrite arbitrary files by specifying the target filename in the target_file parameter. NOTE: this can be leveraged for code execution by overwriting a PHP file, as demonstrated using function/upload_file.php.
https://www.exploit-db.com/exploits/5407
https://exchange.xforce.ibmcloud.com/vulnerabilities/41715
http://www.vupen.com/english/advisories/2008/1163/references