Upgrade to version 1.1.1 or higher, as it has been reported to fix this vulnerability. An upgrade is required as there are no known workarounds.
Vendor URL: http://www.mybboard.com/
Vendor Specific News/Changelog Entry: http://community.mybboard.net/showthread.php?tid=8232
Secunia Advisory ID:19668
FrSIRT Advisory: ADV-2006-1381