Quicksilver Forums contains a flaw that may allow an attacker to carry out an SQL injection attack. The issue is due to the input passed to HTTP_USER_AGENT header not being properly sanitized. This may allow an attacker to inject or manipulate SQL queries in the back-end database.
Upgrade to version 1.1.4 or higher, as it has been reported to fix this vulnerability. An upgrade is required as there are no known workarounds.