Directory traversal vulnerability in SQL-Ledger, and LedgerSMB before 1.1.5, allows remote attackers to read and overwrite arbitrary files, and execute arbitrary code, via . (dot) characters adjacent to (1) users and (2) users/members strings, which are removed by blacklisting functions that filter these strings and collapse into .. (dot dot) sequences.
https://exchange.xforce.ibmcloud.com/vulnerabilities/32776
http://www.securityfocus.com/archive/1/461630/100/0/threaded
http://securitytracker.com/id?1017715
http://securityreason.com/securityalert/2381
http://secunia.com/advisories/24366